The national standards for "Down and Feather" and "Down and Feather Inspection Methods" in China have been revised and implemented on May 1, 2004. The new national standard has added regulations on microbial detection methods and limit indicators for down. The current inspection standards for down clothing in China determine the quality of down clothing from two aspects: first, down quality, and second, clothing quality&Nbsp

(1) Quality Standards for Down

① Fleece content (including the index of duck down in goose down): For example, 80% gray duck down refers to 80% of 100 grams of plush, with the remaining 20 grams being plush pieces that meet the specifications&Nbsp ② Fluffiness: The difference in fluffiness directly affects the warmth retention of down jackets and products&Nbsp ③ Oxygen consumption index: The oxygen consumption index of down refers to the milligrams of oxygen consumed during oxidation of the reducing substances contained in 100 grams of plush under certain conditions. If the oxygen consumption index is ≤ 10, it is qualified. If it exceeds the standard, it indicates that the down washing process is not standardized enough, which can cause bacterial proliferation and be detrimental to human health&Nbsp ④ Cleanliness: Using water as a carrier, the small dust particles contained in the plush are shaken and transferred into water. These small dust particles are suspended in the water, and then the transparency of the water quality is measured using an instrument to determine the cleanliness of the down. If the cleanliness is ≥ 350mm, it is considered qualified. If the index requirements are not met, it indicates that there are many impurities in the down, which can easily cause various bacteria to adsorb in the down, and also have adverse effects on human health&Nbsp ⑤ Moisture content ⑥ Odor level: Three out of five inspectors with the same opinions are considered as the odor evaluation results. If the odor exceeds the standard indicators, it indicates that there is a problem with washing during the water washed down processing. The down jacket is prone to deterioration during wearing and storage, which affects the environment and human health

(2) Apparel quality

① Fabric quality: including fiber identification of clothing surface accessories, fabric appearance inspection, safety performance and functionality of the fabric&Nbsp ② Process quality: including clothing sewing quality, clothing bonding quality, and clothing ironing quality&Nbsp ③ Apparel appearance quality: no stains, no color difference, symmetrical left and right, flat leader, and no manufacturing defects. There is no discoloration or staining after washing&Nbsp

Scope of application:

Applicable to the inspection of filling materials for down feathers and their products.

Test items:

Reference standard item note 1 Component analysis Component analysis includes the separation and analysis of down, down, feather, waterfowl feathers, waterfowl damaged hair, land bird hair, long hair pieces, large hair pieces, and impurities.

. If the goose or duck feather type identification sample has a nominal goose feather (down), the goose or duck feather type identification should be conducted. If the sample has a nominal duck feather (down), there is no need for type identification. 3. Fluffy degree Fluffy degree is an important international indicator for measuring the warmth retention of down, referring to the cubic inch volume of down per ounce (30 grams) under certain conditions. The higher the fluffiness of down, the better the warmth retention of down, indicating that under the same amount of down filling, a larger volume of air layer can be fixed for insulation and insulation. A fluffy down jacket not only has good thermal insulation performance, but also is lightweight and snug, allowing for the integration of more design elements. The oxygen consumption of feathers refers to the milligrams of oxygen consumed when the reducing substances contained in 100 grams of plush are oxidized under certain conditions. The turbidity, transparency, and residual fat content of 5 turbidity down feathers are determined using the Soxhlet extraction method to determine the residual fat and oil content of down and feather products. 7. Odor: Down odor refers to the fishy odor of down, excluding the fragrance level of additives. An abnormal pH value of feathers and down in close contact with the skin can damage the weak acidic environment of the human body, causing skin itching or allergies. The percentage of moisture content in down feathers as a percentage of their original weight/absolute dry weight

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