There is such a kind of material, she is light, soft, and warm.
There is such a kind of material, she has a unique globular structure, it looks like blossoming dandelions.
There is such a kind of material, she contains full of air, absorbs and releases moisture, being able to breathe by herself.
She is Down, the unique, green and natural gift.
Waterfowls are the birds that living on the water surface such as domestic ducks, domestic geese, wild ducks, swan, and graylags. Waterfowls usually have long flat chests and well-developed oil glands in their tails. They are good at swimming by using their webbed feet. Waterfowls can float on the water surface because of their feathers and down contain grease composition, which can protect them from getting wet. Waterfowl down and feathers usually have high resilience performance and excellent fill power.
Down & feathers are the by-products of Waterfowl Meat Food Industry, they are from common waterfowl species such as goose & duck.
SCIENTIFIC AMERICAN (USA) reported: About 220 million years ago, ancestor of goose was the companion of dinosaur, scientists discovered a goose fossil from 70 million years ago.
Plumage of a goose consists of approximately 120 grams of feathers & down
Section ① has approximately 60 grams of small feathers & down.
Secton ② has approximately 150 grams of medium feathers & down.
Section ③ has approximately 90 grams of valueless wing & tail feathers.
Zoology of China (China) Vol.2 conclude: the common domestic ducks were domesticated from mallard ducks and spot-billed ducks.
Plumage of a goose consists of approximately 300 grams of feathers & down
Section ① has approximately 50 grams of small feathers & down.
Secton ② has approximately 40 grams of medium feathers & down.
Section ③ has approximately 30 grams of valueless wing & tail feathers.
DOWN CLUSTER 30%
DOWN CLUSTER 50%
DOWN CLUSTER 75%
DOWN CLUSTER 90%
DOWN CLUSTER 95%
“Fill Power” is a critical indicator which reflects the insulation ability of feather & down products, which is also a measurement of the space occupied by a designated material. The higher fill power means it keeps more air volume, namely the better insulation ability. The international unit of fill power measurement is in³/30g, it says under certain conditions, the exact cubic inch of 30 grams of down occupied. Down content is closely related to fill power.
Professional explanation by Huaxiong, Wang
Fill Power is an indicator of measuring the quality of down washing, drying, and storing. Meanwhile, it’s also a key factor of insulation ability. Fill power is not a fixed indicator after years of observations and experiments. Longtime storage, pressure or freezing could reduce the fill power, but it could be recovered to some extent after proper treatments.
Oxygen No. represents the volume of reducing substances remained in feather & down material. This indicator is measured by the amount of oxygen that has been consumed by the reducing substance when oxidized under certain conditions. The unit of Oxygen No. is mg (oxygen)/ 100g (down).
Down’s chemical property is quite stable; it is hard to be oxygenated. The reducing substances inside has active chemical property, whether they are organic or inorganic. In some cases, such as humid environment, reducing substances will help microorganism increase and damage the feather & down quality. Reducing substances could be largely decreased after the proper washing process. Therefore, the Oxygen No. is a critical indicator in the down quality evaluation.
Waterfowl plumages are covered by fat and oil. The fat and oil can be removed during the washing process. Therefore, the fat & oil rate is another important indicator of down quality after wash.
Method of measurement: The Soxhlet method is generally applied in all kinds of feather & down test methods standards. The technique is dissolving the fat from the plumages in some organic solvent (e.g., ether or diethyl ether). After the solvent has vaporized, weight the fat left inside, then calculate the fat & oil rate.