Down is a type of animal protein fiber, with millions of small triangular pores densely distributed on the spherical fibers. It can contract and expand with changes in temperature, producing a temperature regulating function that can absorb the hot air emitted by the human body and isolate the invasion of external cold air. Down is one level higher than insulation materials such as silk and cotton, for example, the minimum standard of 450 degree fluffy 90 duck down is also better than silk and cotton fluffiness. Therefore, as a pure insulation material, down has much higher economic value than other insulation materials. Type of down: goose down: large down flower, small feather stem, good quality, sufficient elasticity, and strong warmth retention; Duck down: The feather buds and stems are inferior to goose down, but their quality, elasticity, and warmth retention are all high; Goose duck mixed velvet: The velvet is average, with poor elasticity, but good warmth retention; Flying silk: It is processed and crushed from feather pieces, with poor elasticity and warmth retention. It has powder and poor quality, and is prone to clumping after washing. Product inspection: Down jacket, down pants, down quilt, and other products mainly filled with down. The quality of down is mainly determined by measuring the content of feather pieces and feathers. The higher the content of down, the better the quality, and the higher the price. The method of inspection is to first draw a representative sample from a batch of down, weigh a certain weight, select down feathers and feathers, weigh their respective weights, and then calculate the proportion of feathers and feathers. If the total weight of down is 5 grams, including 1 5 grams, which means the velvet content is 30%; The feather weight is 3.2 grams, with a feather content of 64%; Impurities (such as dander and ash) are 0.3g, accounting for 6%. This inspection method has high accuracy, and most down processing factories and raw material procurement units accept it using this method. The general purchaser believes that the above testing methods are slow and rely more on practical experience and sensory estimation of down content. Usually, it is to grab a handful of down and throw it up. As the down is light and the feathers are heavy, the content of down and feathers can be observed when the down falls; The method to determine the impurity content is to rub the down with your hand to make it fluffy, and then shake off the impurities to determine the impurity content

Function of testing report:

1. Project bidding: Issue authoritative third-party CMA/CNAS qualification report

2. Online e-commerce platform entry: Quality inspection report recognized by major e-commerce platforms

3. Used as a sales report: issuing legally effective testing reports to make consumers more confident

4. Papers and research: Provide professional personalized testing needs

5. Judicial services: providing scientific, fair, and accurate testing data

6. Industrial problem diagnosis: Verify the troubleshooting and correction of industrial production problems

100% inspection and testing process:

1. Telephone communication and confirmation of requirements

2. Recommend solutions and confirm quotations

3. Mail samples and arrange testing

4. Progress tracking and result feedback

5. Provide reports and after-sales service

6. If urgent or priority processing is required

Testing and testing characteristics:

1. The testing industry is fully covered, meeting different testing needs

2. Fully cover the laboratory and allocate localized testing nearby

3. Engineers provide one-on-one services to make testing more accurate

4. Free initial testing, with no testing fees charged

5. Self service order delivery for free on-site sampling

6. Short cycle, low cost, and attentive service

7. Possess authoritative qualifications such as CMA, CNAS, CAL, etc

8. The testing report is authoritative and effective, and is generally used in China