When we buy donkey-hide gelatin, how should we identify the authenticity of donkey-hide gelatin? Below I will introduce to you the method of identifying the authenticity of donkey-hide gelatin. Welcome to read. How to distinguish true and false donkey-hide gelatin

Recognize the brand

Li Shizhen's "Compendium of Materia Medica" records: "Donkey-hide gelatin, the best grade in this classic, Hongjing said: "It comes from Dong'e, so it is named donkey-hide gelatin." It can be seen that the most authentic donkey-hide gelatin is produced in Dong'e County, Shandong Province.

There are many different brands of donkey-hide gelatin currently on the market. When purchasing donkey-hide gelatin, you must choose products produced by big brands, large enterprises, and listed companies. Donkey-hide gelatin, like other medicines, is a special commodity and must be marked on the packaging. Registered trademarks such as "Dongye Ejiao", manufacturer, factory address, approval number, functions and indications, etc. are currently on the market. "Dongae Ejiao" is the most popular and has the best quality.

Look at the packaging

The outer packaging of genuine donkey-hide gelatin has been professionally designed, with clear patterns and logo lines, and exquisite printing. The product name "donkey-hide gelatin" has an obvious concave and convex feel. Use a one-time tear-off package, tear along the zigzag line on the left side of the front of the box, and you will see a set of 16-digit anti-counterfeiting numbers. According to the instructions, you can enter the number as prompted by making a phone call, writing a text message, or searching online, and you will know the authenticity. Fake. Generally, the printing on the outer packaging of fake donkey-hide gelatin is rough, and there are often typos, omissions, and registered trademark and labeling errors. Some fake donkey-hide gelatin also has anti-counterfeiting marks, but almost all anti-counterfeiting calls cannot be answered or prompt for input errors. Together, it's clear.

Look at the product

Genuine donkey-hide gelatin is in the shape of a regular rectangle, consistent in size and thickness, with a smooth and bright surface and uniform color. The product name is printed on the front, the font is clear and clear, and it is dark red; There are two regular divisions on the back of the block. It is hard and brittle. It can be broken by hand with a little force. If the rubber block is slapped hard on a hard object, it will break into several pieces. The cross section will be bright and will appear brown and translucent when exposed to light. There are no oil holes or pores; fake donkey-hide gelatin is generally black or obviously yellow in color, with many irregular glue blocks, rough and dull surface, varying sizes and thicknesses, and the product name on the front is printed with paint, pigments, etc., and the color is mostly bright red. , the handwriting is often blurred and crooked, and there are many cracks on the words; the back side often has no dividing lines, and those with dividing lines are also irregular. Most of them are hard but not brittle, some are bendable, not easy to break, not easy to break when slapped, and the cross section is gray and black. , not bright, easily softened and bonded, with oil holes, pores, etc.

Smell the smell

Just smell the smell of donkey-hide gelatin. "Compendium of Materia Medica" records: "The fake ones have turbid and smelly breath and cannot be used as medicine." The true person does not have stinky skin, and the summer moon is not wet and soft. Fake donkey hide gelatin is usually made from scraps of cowhide and horsehide and has a rancid smell. The simplest way is to put the purchased pieces of donkey-hide gelatin in your hands, blow the air out of your mouth first, and then put it in front of your nose and smell it. If it is real donkey-hide gelatin, it will have a unique fragrance of traditional Chinese medicine, and the smell will be one of the best. Vibrate. If it is fake donkey hide gelatin, it will have an obvious odor. Another method is to smash the genuine donkey-hide gelatin into a cup, add an appropriate amount of boiling water, then cover the cup and leave it for 1-2 minutes. After opening, the gelatin will have a strong fragrance. Or remove the outer packaging of the film and wrap it in a hot and humid towel for 1-2 minutes. After opening, it will smell like glue. The counterfeit product has been tested by the above two methods and has no glue fragrance but fishy odor.

Measuring the hardness and brittleness

Take genuine donkey-hide gelatin and slap it hard on the table. It will break into several pieces. If the cross section of the fragments is brown, translucent and has no foreign matter, it is genuine. The donkey-hide gelatin of poor quality is tougher and difficult to break, so it is suspected to be a fake. Miscellaneous leather glue

Test the dissolution property

Finally, look at the dissolution property. After smashing the genuine donkey-hide gelatin When heated and stirred with water, it will easily dissolve completely. When heated and dissolved in water, the liquid surface will consist of a layer of fatty oil, with the smell of pork skin soup and no granular foreign matter visible to the naked eye. Bad donkey-hide gelatin is not easy to dissolve, and in some cases, insoluble floc will appear.

Touch the dry humidity

Touch the skin of donkey-hide gelatin.

"Compendium of Materia Medica" records: "The true person will not have stinky skin, nor will it become wet and soft during the summer months." Even in summer, donkey hide gelatin made of pure donkey skin will not become wet or soft, the skin will be dry, and your hands will not get wet when touched. If the skin of donkey-hide gelatin is moist and sticky to the touch, it is a fake product and must not be purchased.

Test with fire

Take a little sample of real donkey-hide gelatin and burn it in a crucible. It will burst at first, then expand, melt and emit white smoke, with a strong aroma of sesame oil. The residue after ashes It is black in color, loose in texture, in the form of flakes or lumps, and does not adhere to the crucible. Otherwise it is fake.

Use water bubbles

To identify true and false donkey-hide gelatin, you can also smash the genuine gelatin block, take an appropriate amount into a transparent glass, add an appropriate amount of boiling water, stir and dissolve, and place it for 1 ~2 minutes, there will be no visible granular foreign matter in the glue solution, and there will be a slight unique glue aroma. When the donkey-hide gelatin dissolved in hot water is refrigerated, it will become jelly-like; the fake donkey-hide gelatin solution will have an obvious fishy or peculiar smell. Odor, some insoluble floc will appear, and obvious granular foreign matter is common in the glue after melting. The donkey-hide gelatin solution did not agglomerate after standing for 4 hours, and the counterfeit product solution agglomerated into a paste.