1. Category B refers to products that come into direct contact with the skin.

2. Category A refers to infant products, that is, textile products worn or used by infants and young children under 36 months of age, such as diapers, diapers, underwear, bibs, pajamas, gloves, Socks, outerwear, hats, bedding;

Category B refers to products that are in direct contact with the skin, that is, textile products in which most of the area of ??the product is in direct contact with the human body's skin when worn or used, such as bras, Belly bands, vests, shorts, cotton sweater pants, shirts, (summer) skirts, (summer) pants, socks, sheets;

Category C refers to products that do not come into direct contact with the skin, that is, when worn or used , Textile products whose products do not come into direct contact with human skin, or only a small area of ??which is in direct contact with human skin, such as coats, skirts, trousers, curtains, bedspreads, wall coverings, fillings, and interlinings.

According to the relevant parameters of the "National Basic Safety Technical Specifications for Textile Products GB 18401-2010", formaldehyde content, PH value (acidity and alkalinity), color fastness, odor and decomposable aromatic amine dyes in clothes are required Five items of the *** must meet the standards. According to the degree of contact between textile products and the human body and the special conditions of infants and young children, textile products are divided into: Category A: products for infants and young children; Category B: products in direct contact with the skin; Category C: non-toxic products Products that come into direct contact with skin.

The judgment of peculiar smell adopts the method of olfactory evaluation, and the evaluators should be professionals who have undergone certain training and assessment. After the sample is opened, the test for this item is carried out immediately. The test should be conducted in a clean environment without abnormal odor. The operator must wear gloves, hold the sample close to the nasal cavity with both hands, and smell the smell of the sample carefully. If there is a musty smell, high-boiling petroleum smell (such as gas oil, kerosene smell), fishy smell, aromatic hydrocarbons, If one or more of the odors are found, it will be judged as "odorous" and the category of the odor will be recorded. Otherwise, it will be judged as "no odor". Three people should make independent judgments, and the consistent result of the two people should be used as the sample test result.

Reference: National Basic Safety Technical Specifications for Textiles—Baidu Encyclopedia