The washing powder contains no or little phosphorus (p) element

The washing powder contains phosphorus compounds, which can combine with calcium and magnesium ions in the water to reduce the hardness of the water. , thereby improving the decontamination effect of bathing. However, a large amount of phosphorus-containing wastewater was produced after washing. Since phosphorus is a nutrient for plant growth, an increase in phosphorus will cause plants in the water, algae, to multiply. Algae consume oxygen dissolved in the water, causing water quality to deteriorate and fish to die in large numbers. At this time, eutrophication occurs in the water body.

We know that the most important nutrients that determine the growth of algae are nitrogen and phosphorus. So, can limiting nitrogen prevent eutrophication of water bodies? cannot. Because algae can directly fix the nitrogen it needs from the air, and after the algae die, microorganisms will decompose their "remains" and the nitrogen obtained can be reused by other algae.

Scientists have learned through experiments that only by limiting the phosphorus in water bodies can eutrophication of water bodies be prevented. Therefore, limiting the use of phosphorus-containing laundry detergent can effectively control eutrophication of water bodies.

5 German Henkel invented washing powder for the first time in 1907, using borate and silicate as the main raw materials. Laundry powder is an alkaline synthetic detergent. The main component of laundry powder is anionic surfactant: sodium alkyl benzene sulfonate, a small amount of nonionic surfactant, plus some additives, phosphates, silicates, Yuanming powder, fluorescent agent, enzyme, etc. Made by mixing, powder spraying and other processes. Nowadays, 4a fluorspar is mostly used instead of phosphate.

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Definition

Synthetic detergents use surfactants as the main component and are equipped with appropriate amounts of builders with different functions. Laundry powder refers to powdered (granular) synthetic detergent.

After the 1940s, with the development of the chemical industry, people used sodium tetrapolypropylene benzene sulfonate, a chemical substance extracted from petroleum, to create detergents with better performance than soap. . Later, people added phosphates, which can soften hard water and improve the decontamination effect of detergents, into detergents, so that the detergent's performance would be even more perfect. For the convenience of use, carrying, storage, and transportation, people made detergents into washing powder.

Because washing powder can show good decontamination effects in various water types such as well water, river water, tap water, spring water, and even sea water, and is widely used in various types of fabrics, its production and use It developed rapidly. Nowadays, laundry detergent is a necessary cleaning product for almost every household.

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Ingredients

There are five major categories of ingredients in laundry detergent: active ingredients, detergent ingredients, buffer ingredients, and synergists. Ingredients, auxiliary ingredients.

The main ingredients are: fabric fiber anti-scaling agent, anionic surfactant, nonionic surfactant, water softener, dirt suspending agent, enzyme, fluorescent agent and spices; poor washing powder often Contains harmful ingredients such as phosphorus, aluminum, and alkali. The function of surfactant in washing powder is to make the washing powder soluble, emulsified, soaked, cleansed, sterilized, softened, foamed, and prevented from static electricity on clothes. Synthetic surfactants have long been found to have side effects such as making hands thicker, and are now regarded as a major environmental hazard. In addition, phosphorus and aluminum alkali, especially phosphorus, have been banned from being used in laundry detergents in some developed countries. However, many chemical factories in our country are still producing such products, especially some foreign-funded enterprises, and their own local products cannot be used. These harmful substances, in our country, take advantage of the imperfect laws and people's weak environmental awareness to boldly add these harmful substances

Active ingredients

The active ingredients are in detergents The ingredient that plays the main role. Washing active ingredients are a type of substance called surfactants. Their function is to weaken the adhesion between stains and clothes. Under the action of washing water flow and mechanical force such as hand rubbing or washing machine agitation, the stains are separated from the clothes, thereby removing the stains from the clothes. To achieve the purpose of washing clothes.

Note: 1. To achieve good decontamination effect, the washing powder should contain enough active ingredients. In order to ensure the washing effect of washing powder, the national competent authorities have stipulated the minimum content of active ingredients in washing powder.

Depending on the type of active agent used and the category of the product, the amount of active ingredients in laundry detergent should generally not be less than 13%;

2. Because many surfactants have strong foaming ability, consumers can Based on experience, the quality of washing powder can be judged by how it foams after being dissolved in water;

3. However, some washing powders specially used for drum washing machines have better foaming capacity than ordinary washing powders. Much worse. This is because the drum washing machine mainly relies on the mechanical force generated by the tumbling of clothes in the drum to achieve the purpose of washing clothes. Excessive foam in the washing solution will greatly weaken the mechanical force generated by the tumbling of clothes, greatly reducing the cleaning effect.

Detergent builders

Detergent builders in laundry detergents are the most commonly used ingredients, generally accounting for 15%-40% of the total composition. The main function of the builder is to soften the water by binding the hardness ions contained in the water, thereby protecting the surfactant to maximize its effectiveness. The so-called phosphorus-containing and phosphorus-free detergents actually refer to whether the builder used is phosphorus or non-phosphorus.

Note: 1. Some provinces and cities have formulated local regulations to prohibit or restrict the sale and use of phosphate-containing detergents.

2. Among non-phosphorus detergent builders, a substance called zeolite is recognized by the industry as a good substitute for phosphate components.

3. In addition, there are various "cheap" phosphorus-free builders, such as sodium carbonate (soda ash), sodium silicate (water glass) and their complexes in various proportions. . Since these phosphorus-free additives eventually form water-insoluble precipitates, if they cannot be effectively suspended in the water, they will sink on the clothes. The result of long-term use of this phosphorus-free detergent will be hardening and yellowing of the clothes. To prevent this from happening, well-designed phosphorus-free detergents must use effective dispersants in the formula so that the insoluble particles formed do not settle on the clothes.

Buffering ingredient

Common dirt on clothing is generally organic stains, such as sweat stains, food, dust, etc. Organic stains are generally acidic, so making the washing solution in an alkaline state is conducive to the removal of such stains, so a considerable amount of alkaline substances are added to washing powder. Generally used are soda ash and water glass.

Note: 1. Although alkalinity is beneficial to washing clothes, excessive alkaline substances can cause damage to clothes and skin. Therefore, the country has made corresponding regulations on the alkalinity of washing powder. The laundry detergent should meet these requirements.

2. In addition, as mentioned earlier, these alkaline substances will form precipitates with hard water, and too much alkaline substances will cause a large amount of precipitates to form during washing, which will in turn make the washing effect worse.

Synergizing ingredients

In order to make detergents have better and more washing-related functions, more and more detergents contain ingredients with special functions. These ingredients It can effectively enhance and improve the washing performance of detergents.

According to functional requirements, the synergistic ingredients used in detergents include the following categories: those that improve the cleaning effect, such as enzyme preparations (protease, lipase, amylase, etc.), bleaching agents, and bleaching accelerators etc.; those that improve whiteness maintenance, such as anti-redeposition agents, dirt dispersants, enzyme preparations (cellulase), fluorescent whitening agents, anti-dye agents; those that protect fabrics and improve fabric feel, such as softeners, cellulase, Antistatic agent, color protection agent, etc.

Note: 1. In fact, many brands of detergents use similar main ingredients, and the secret of each product often lies in these synergistic ingredients. The use of various enzyme preparations can greatly enhance the detergent's ability to clean special and difficult-to-wash stains, such as blood stains, sweat stains, food oil stains, vegetable and fruit stains, etc.; bleach can decompose and remove pigment stains; anti-renew The depositing agent ensures that clothes will not turn gray or yellow after multiple washes.

Auxiliary ingredients

These ingredients generally do not improve the washing ability of detergents, but they play a greater role in the processing of the product and the sensory indicators of the product, such as making laundry The color of the powder is white, the particles are uniform, no agglomeration, and the aroma is pleasant.

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Scientific use of washing powder

1. Classification< /p>

[A well-known brand of phosphorus-free laundry detergent]

A well-known brand of phosphorus-free laundry detergent

Washing powder is a type of synthetic detergent and is a necessary Essential household items.

Currently, there are three main categories of washing powder on the market, each with its own characteristics:

1. Ordinary washing powder and concentrated washing powder

Ordinary washing powder has large and loose particles that dissolve Fast, with rich foam, but relatively weak detergency and difficult to rinse, generally suitable for hand washing; concentrated laundry detergent has small particles, high density, less foam, but strong detergency (at least twice that of ordinary laundry detergent) , easy to clean, water-saving, generally suitable for machine washing.

2. Phosphorus-containing laundry detergent and phosphorus-free laundry detergent

Phosphorus-containing laundry detergent uses phosphate as the main additive, and phosphorus can easily cause eutrophication of environmental water bodies, thereby damaging Water quality, environmental pollution. Phosphate-free laundry detergent does not have this shortcoming and is conducive to water environment protection. For the health of our living environment, it is recommended to use phosphorus-free laundry detergent.

3. Enzyme-added laundry detergent and fragrance-added laundry powder

Enzyme-added laundry detergent means enzymes are added to the washing powder, and fragrance-added washing powder means fragrance is added to the washing powder. Enzyme-added laundry detergent has special functions in removing specific dirt (such as juice, ink, blood stains, milk stains, gravy, milk, soy sauce stains, etc.). At the same time, some of the specific enzymes can also sterilize, whiten, protect and enhance color. Brilliant and other effects. Fragranced laundry detergent not only satisfies the washing effect, but also makes clothes emit fragrance, making people feel more comfortable.

The correct use of washing powder

The correct use of washing powder can improve the effectiveness of washing powder, maximize the effect of washing powder, and save water. Before use, you should check the packaging to find out the type of washing powder and use it correctly according to the instructions on the packaging bag. Generally speaking, washing powder should be dissolved in warm water first. Then soak the soaked clothes in it, and the washing effect will be best after 15 to 20 minutes. Special attention should be paid to the fact that the temperature of water used in enzyme-added washing powder cannot exceed 60°C, otherwise the enzyme will be inactivated (ineffective), thus affecting the washing effect.

Storage of washing powder

When storing washing powder, pay attention to moisture and sun protection. It should be placed in a cool and dry place, especially enzyme-added and fragranced washing powder. If the temperature is too high, the fragrance will When it evaporates, the enzyme will lose its activity

II. Purchasing

(1) Look for the “national standard”

Washing powder is closely related to daily life, but laundry detergent The powder has certain toxicity. If it invades the human body, it will cause hemolysis, thymus damage, decreased body resistance, diarrhea, weight loss, spleen atrophy, liver cirrhosis, etc. Therefore, only by choosing qualified products can you use them with confidence.

The packaging of laundry detergents produced in accordance with national standards is usually marked with both numerical and text performance marks:

●Number model mark indicating performance

Numbers The model mark indicates the surfactant content, and the surfactant content is the main determinant of the detergency. For example, type 30 means that its surfactant content is 30%, which is a high-grade washing powder and can wash wool and silk; type 20 means that its surfactant content is 20%, which is a low-grade alkaline washing powder and is suitable for washing linen fabrics. ;There are also type 25, type 28 and so on.

●Text marks indicating performance

Mainly divided into five categories: (1) High-foaming type (ordinary type), suitable for manual washing; (2) Low-foaming type, containing Polyether and soap ingredients, high efficacy, low foam, easy to rinse, and are specially used for washing machines; (3) Bleaching type, containing sodium borate or sodium percarbonate, has a bleaching effect in hot water above 60°C, and is suitable for washing White clothes; (4) Enzyme type, containing biological catalysts, which can decompose sweat stains, milk stains and blood stains on clothes, and has the best effect when used in 45℃ water; (5) Brightening type, containing fluorescent whitening agent, white clothes It can whiten and enhance the beauty of colored clothes.

Experts from the State Bureau of Quality Supervision suggest that consumers should look for the “national standard” when purchasing laundry detergent. "National Standard" brands will be marked with the "GB" logo on their packaging. If consumers have no way to determine whether the product uses the "national standard", it is best to choose quality-guaranteed washing powders such as inspection-free products and brand products. First, they must identify the trademarks and pay attention to those products that do not have obvious place names or factory names printed on them. secondly, pay attention to the appearance when selecting, and thirdly, do not buy from unlicensed stalls to avoid being deceived.

[At first glance, it looks like Diaopai’s Zhouzhu brand washing powder]

At first glance, it looks like Diaopai’s Zhouzhu brand washing powder

（ 2) Identify the pros and cons

●Distinguish the packaging of famous brand and high-quality washing powder packaging bags with clear printing and no wrong printing and ink contamination; counterfeit famous brand washing powder, most of the packaging has poor printing quality and contains wrong printing and ink. pollution phenomenon.

●The appearance of brand-name high-quality laundry detergents is that they are hollow granules similar to millet grains. They are fluffy and full when bagged, and have a slippery feel when touching the bag. They are pure in color and have even particle distribution. Fake and shoddy laundry detergents are Mixed with coarse particles or hard agglomerates, it is not full after bagging, the bag has large gaps, the bag feels sluggish when touched by hand, and the pink color is grayish-yellow. If the color of the added enzyme is gray-blue, the enzyme activity has expired or is other dyed substances.

●High-quality washing powder dissolves quickly in water, the solution does not feel burning when touched, the solution is clear and smooth, the amount of foaming is large, the detergency is obvious, the dosage is small, and the washing efficiency is high Obviously, the smell is not pungent. Fake and inferior washing powder dissolves slowly in water, the aqueous solution is turbid, there is sediment on the bottom of the basin, and the solution feels burning when touched. The amount of foam is very small, and the detergency is poor. After adding a large amount, its washing efficiency is still very low, and the smell is unpleasant. Pungent alkaline smell.

3. Usage

Proper use of washing powder can improve the effectiveness of washing powder, maximize the effect of washing powder, and save water. Before use, you should check the packaging to find out the type of washing powder and use it correctly according to the instructions on the packaging bag. Generally speaking, washing powder should be dissolved in warm water first. Then soak the soaked clothes in it, and the washing effect will be best after 15 to 20 minutes. Special attention should be paid to the fact that the temperature of water used in enzyme-added washing powder cannot exceed 60°C, otherwise the enzyme will be inactivated (ineffective), thus affecting the washing effect.

4. Storage

When storing washing powder, pay attention to moisture and sun protection, and place it in a cool and dry place. Especially for laundry detergents with enzymes and fragrances, if the temperature is too high, the fragrance will evaporate and the enzymes will lose activity.

5. Precautions

Washing powder dissolved in water can be absorbed into the human body through the skin. Long-term accumulation can easily damage liver function and even cause cancer.

Washing powder is an alkaline chemical detergent synthesized from sodium alkyl benzene sulfonate, sodium sulfate, sodium myceliodate, sodium tripolyphosphate and carboxymethyl fiber. Frequent contact with washing powder (water) can easily cause skin keratinization and cracking; washing your hair with washing powder will make your hair yellow and brittle; after entering the human hematopoietic system, it will affect liver function.

Enzyme-added laundry detergent contains alkaline protease to hydrolyze proteins on clothes and remove dirt and scale. This alkaline protease can also decompose skin surface proteins, causing people to suffer from allergic dermatitis, eczema, etc.

Clothes and quilts washed with washing powder need to be rinsed thoroughly with water; baby diapers, underwear, underwear, and adult underwear should not be washed with washing powder (but soap or natural soap powder can be used); It is also not advisable to use laundry detergent to wash cooking utensils and tableware. Personnel who have been exposed to washing powder for a long time should take necessary protection and try not to come into direct contact with washing powder.

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Misunderstandings about the use of washing powder

[Get out of the misunderstanding of washing powder]

Get out of the misunderstanding of washing powder Know the misunderstanding

Myth 1. The more foam, the stronger the detergency.

Some consumers mistakenly believe that the more foam in washing powder, the better. In fact, the amount of foam is related to the decontamination. There is no direct connection. When washing clothes, you should add enough washing powder. When washing particularly dirty clothes, you should add more washing powder, but it does not mean that adding more washing powder is better. When the washing powder reaches a certain concentration and the surface activity of the aqueous solution reaches the maximum value, the detergency will no longer increase with the increase of washing powder, but will tend to decrease. Practice has proven that when the concentration of washing powder is 0.2% to 0.5%, the aqueous solution has the highest surface activity and the strongest cleaning and decontamination ability. That is to say, add 5 to 10 grams (about 1 teaspoon) of laundry detergent to a basin of clean water. Powder is enough. Adding too much washing powder will not only increase the decontamination effect, but will also damage the clothing fibers due to the increase in alkalinity in the solution. In addition, a large amount of washing powder is attached to the clothes, causing a lot of foam, making it difficult to rinse, consuming water and time, causing waste, and the ingredients remaining on the clothes can also cause damage to the skin and cause allergic reactions.

Myth 2: Natural soap powder = washing powder

Currently, a product called natural soap powder appears on the market. Many consumers think it is also a kind of washing powder. In fact, soap powder Not exactly the same as laundry detergent. From a functional point of view, natural soap powder is better than laundry detergent. It does not contain phosphates and has natural properties, so it is less irritating to the skin, safe, and protects fabrics. It has affinity for fabrics. Clothes are fluffy and soft after washing, which solves the problem of fabric dirt accumulation after multiple washings with synthetic laundry detergent. , fabric hardening, static electricity and other problems.

Soap powder is an ultra-low-foaming washing product that is easier to rinse, so it is more suitable for washing close-fitting clothing. Because natural soap powder is added with a special calcium soap dispersant, its detergency is stronger. Plus, the fragrance is strong and lingers on the fabric after it dries.

Myth 3: Laundry powder does not hurt your hands

Due to the fierce competition in the washing powder market, in order to show the "unique" efficacy of the product, some manufacturers have launched innovative "washing powder that does not hurt your hands" ”, “hand-friendly dishwashing liquid”, etc., aiming to capture more market share. However, these exaggerated claims can easily mislead consumers. Because synthetic detergents are chemical products in the final analysis, and they will cause more or less damage to the skin while removing stains. Prolonged exposure can cause skin problems such as rash, erythema, scaling, and eczema. If too much is absorbed into the body through the skin, it may also damage the body's hematopoietic function, lymphatic system and liver function, and some may even cause cancer.

Misunderstanding 4: Treating washing powder as dishwashing agent

Some families use washing powder to wash dishes, which is very bad. The main ingredient in laundry detergent is sodium alkyl benzene sulfonate, which is moderately toxic. If its particles adhere to tableware and enter the human body through the gastrointestinal tract, they can inhibit the activity of pepsin and pancreatic enzymes, thereby affecting gastrointestinal digestive function. It can also damage liver cells, leading to liver dysfunction, which over time can cause People have diarrhea, indigestion, liver and kidney abnormalities, spleen shrinkage, and even cause cancer and blood diseases. Therefore, never use laundry detergent as dishwashing detergent.

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Questions and answers about washing powder

1. Is washing powder a "universal cleaner"? (no)

In life, many people do use washing powder as a "universal cleaner". In addition to washing clothes, they also use it to wash fruits, vegetables, tableware, and scrub furniture and floors. It is believed to have decontamination, disinfection, and sterilization effects. As everyone knows, this may cause the washing powder to enter the human body. Experts remind that even a very small amount of washing powder entering the body can cause poisoning.

2. Can washing powder be mixed with disinfectant? (no)

Many housewives like to add some disinfectant when washing clothes with laundry detergent. But this kind of laundry method may greatly reduce the effectiveness of cleaning and disinfection.

The ingredients of washing powder are different, including anionic, cationic or non-ionic, and the same is true for disinfectant. If washing powder and disinfectant are used together, a neutral reaction will easily occur and the efficacy of each will be weakened.

Most disinfectants are used to eliminate pathogenic microbial contamination. Unless under special conditions, such as someone in the family suffering from pink eye, diarrhea, onychomycosis, scalp ringworm, etc. or women during menstruation, puerperium and infancy, otherwise, There is absolutely no need to use disinfectant for washing clothes. Because people themselves have a certain degree of resistance, a small amount of non-pathogenic microorganisms will not pose a threat to health. After washing and drying clothes and exposing them to sufficient sunlight, the bacteria remaining on the clothes will self-destruct after a certain period of time. perish. Frequent use of disinfectants not only reduces the body's own resistance, but also easily causes liver damage.

3. Is multi-functional laundry detergent more effective? (no)

Many washing powders on the market today have added some new ingredients and have more and stronger washing functions. These ingredients mainly include surfactants, builders, stabilizers, whitening agents, flavors and enzymes, etc., to achieve the purpose of being easily soluble, cleansing, softening, foaming, and preventing static electricity on clothes. But there are too many substances added to washing powder, which is not a good thing for our health.

In addition to absorbing water, the alkaline substances contained in powerful laundry detergents can also damage human cell membranes and denature tissue proteins; fragranced laundry detergents contain too many synthetic flavors and have an offensive smell, which often causes some People are allergic; the organochlorines and fluorescent agents contained in whitening washing powder are toxic substances that can easily accumulate in the human body and cause damage to health.

Therefore, when buying washing powder, try to choose one with simple functions, few added ingredients, and light smell. From an environmental perspective, it is best to choose phosphorus-free laundry detergent that causes little water pollution.

4. When doing laundry, do you put the clothes first and then the water and washing powder? (no)

Many people are used to storing dirty clothes in the washing machine, and then adding water and washing powder when washing. In fact, when cleaning the laundry, you should put the washing powder first. Because it is a powdery substance, it is not easy to dissolve. It should be dissolved with water before it can better exert its effect, so as to avoid being rinsed cleanly and causing residue.

The correct method is: first dissolve the washing powder in water, then put in the clothes to be washed, soak for ten minutes before washing.

5. Will the greater the amount of washing powder used, the cleaner the clothes? (no)

The dosage of washing powder for machine washing and hand washing is printed on the packaging of laundry detergents currently sold. When doing laundry, you should put in the appropriate amount of detergent according to the standards. When the amount of detergent exceeds the standard, the excess detergent will not only fail to increase the detergency, but will easily remain on the clothes, making it difficult to clean, and will also irritate the skin. If the detergent contains bleaching effects, excessive use will cause fading and damage to the clothes.

[Avoid washing powder hurting your hands]

Avoid washing powder hurting your hands

6. Is the higher the water temperature the better when washing clothes? ? (no)

The hotter the water temperature for washing clothes, the better. Various enzyme-containing laundry detergents are commonly used, among which the enzyme preparations mainly include alkaline protease and alkaline lipase.

Alkaline protease is used to break down protein stains, such as sweat stains, blood stains, etc. Alkaline lipase mainly acts on fatty acid and its ester dirt, which is usually referred to as oil dirt. The activity of the two enzymes is related to temperature, with approximately 40°C being the most suitable. Temperatures that are too high or too low will reduce enzyme activity.

Secondly, proteins have denaturation effect. Its distinctive feature is that the protein coagulates and its solubility is significantly reduced. An example of this is the coagulation of eggs after being cooked. One of the conditions that causes denaturation is high temperature. The same goes for protein stains on clothing. Therefore, if the water temperature is too high during laundry, they will denature and solidify on the fabric fibers, making it more difficult to wash.

7. Is washing powder suitable for hand washing? (no)

After the skin is in direct contact with alkaline washing powder for a long time, the weak acid environment on the skin surface will be destroyed, and its effect of inhibiting bacterial growth will also disappear, which can easily lead to skin itching and even allergies. Symptoms such as dermatitis or leaving pigmentation on the skin. So never use washing powder to wash your hair or contact the skin for a long time. If you wash clothes by hand, it is best to use soap.

8. Is it important to leave some foam after washing clothes? (no)

Today's washing products seem to be very "efficient" and they are used as little as possible, but every time the clothes are washed, there is always a lot of foam left on the wall of the drum of the washing machine. Or when washing clothes by hand, after rinsing five or six times, there are still many "little bubbles" stubbornly left on the water. Does it matter?

Relevant experts pointed out that it does not matter if a small amount of foam remains, it should be within a safe range. When the amount of washing powder is roughly appropriate, the normal washing program set by the fully automatic washing machine can completely rinse the clothes. If you wash them by hand, rinse them thoroughly two or three times. Consumers can choose high-foaming and low-foaming detergents according to their own habits. No matter what kind of laundry product is chosen, it should be based on the user's own feeling that it can be washed, convenient, and easy to rinse, which means that the user's habits and feeling are comfortable.

9. Does washing powder have no shelf life? (no)

Laundry detergent cannot be used indefinitely. Ordinary washing powder can generally be stored for two or more years under specified storage conditions. However, some washing powders with special ingredients have a service life of less than two years.

In order to avoid the deterioration of washing powder, when storing washing powder, you should pay attention to moisture and sun protection. It should be placed in a cool and dry place, especially enzyme-added and fragranced washing powder. If the temperature is too high, the essence will volatilize and the enzyme will Loss of activity. It is best to put it in a plastic bottle or jar with a lid. On the one hand, it prevents the washing powder from absorbing moisture and clumping. On the other hand, it also prevents people from inhaling more synthetic fragrance after the fragrance is released.

10. How to identify fake and inferior washing powder? (tips)

1. Distinguish from the packaging: brand-name high-quality washing powder, the packaging bag is clearly printed, and there is no misprint or ink contamination. Fake brand-name washing powder, the packaging is mostly waste products removed from the printing factory. There are misprints and ink contamination.

2. Distinguish from the appearance: famous brand high-quality washing powder, the powder is in the shape of hollow granules similar to millet grains, the bag is fluffy and full, the bag has a slippery feel when you touch it, the color is pure, and the particles are evenly distributed. Fake and shoddy washing powder is mixed with coarse particles or hard agglomerates. It is not full after being bagged, the bag has large gaps, the bag feels heavy when touched, and the pink color is grayish-yellow. If the color of the added enzyme is gray-blue, the enzyme activity has expired or is other unknown substances after dyeing.

3. Distinguish in terms of use: famous brand body washing powder dissolves quickly in water, the solution does not feel burning when touched, the solution is clear and smooth, has a large amount of foaming, and has obvious detergency. Dosage It is less, but the cleaning effect is obvious, and the smell is not pungent. Fake and inferior washing powder dissolves slowly in water, the aqueous solution is turbid, there are sediments on the bottom of the basin, and the solution feels burning when touched. The amount of foam is very small, and the detergency is poor. After increasing the dosage, its washing efficiency is still very low and the smell It has a pungent alkaline smell.

Recommendations: When buying laundry clothes, first, identify the trademark and do not buy those that do not have obvious place names or factory names; second, pay attention to appearance selection, and third, do not buy from small businesses that operate without a license. Buy from stalls to avoid being scammed. Look at whether the bag is marked "Phosphorus-free". The difference lies in whether it contains phosphorus. Phosphorus-containing laundry detergent will cause eutrophication of the water system, causing a large number of bathing animals to multiply, causing damage to the ecological balance of the water, which is commonly known as "red tide" ” and “bloom”. Laundry powder is composed of surfactants (which play the main role in decontamination) and auxiliaries. Among the additives is sodium tripolyphosphate, which can chelate heavy metals, disperse dirt, and prevent laundry detergent from clumping. However, the phosphorus it decomposes when it is discharged into rivers with sewage will cause excessive reproduction of algae and cause pollution, so now washing powder is recommended to be phosphorus-free or low-phosphorus. pThere is a difference between ordinary washing machines and drum washing machines. Front-loading washing machines are more suitable for washing cotton, wool and other soft clothes. The washing range of ordinary washing machines is relatively large. Sugar bubble drum laundry detergent is developed according to the characteristics of drum washing machines. It has less foam, high cleaning rate and protects the machine. Extend the service life of the machine. The friction coefficient of ordinary washing machines is high, so the laundry detergent is required to be gentle to reduce damage to clothes. Sugar bubble laundry detergent is developed based on different working principles. Protect machines and clothing,