● Down Cluster: Down in a cluster shape with down fibers emanating from the down core.

● Nestling Down: Immature down in an umbrella shape.

● Judgment Reference: 1. Obvious quill shafts, inconspicuous short quill. 2. Three-dimensional

● Plumule Down: Down in a feather shape, fluffy filament barbs grow on soft quill shafts.

● Damaged Down: Down having two or few more fibers emanating from the down core.

● A single fiber detached from down or the feather quill point.

● Feathers grow on the waterfowl scarfskin. The feather quill shaft can be folded without breaking.

● Long Goose Feather: Goose feather that is longer than 8cm.

● Long Duck Feather: Duck feather that is longer than 7cm.

● A single feather barb detached from the vane.

● Colored Feather: waterfowl feathers that has colors other than white color (including deep yellow color), which are still considered in feather volume.

● Colored Down: Waterfowl down that has colors other than white color (including deep yellow color), which is still counted in down volume.

● These feathers have been moth-eaten, mildewed or mechanically damaged during washing process, including the broken feather and the feather that has been damaged more than 1/3.

● Judgment Reference:1. Feather with 1/3 damaged area or more. 2. Bald feather quill. 3. Feather quill that has been broken off in the middle. 4. Part of feather surface detached from the feather.

● Chicken Feather: Looks bright and shiny.Feather fibers are thicker compares to duckeather. Long pointy shape of favion.There is one attached feather on the bottom of the quill, which can be easily distinguished from goose or duck feather. But some of the chicken feathers don’t have attached feathers. Therefore, the attached feather is not the only way to judge if it is a chicken feather. Some other chicken feathers have the shape of a tree branch with yellowish color, and it shows a specific shape of bamboo nodes under the electron microscope.

● Pigeon Feather: feathers plucked from pigeons, with bright and shiny color, which is hard to distinguish it from chicken or other land fowl feathers. Normally needs to identify it under a microscope.

● Dust, ash, scurf, small vein and other elements that mixed inside the feather and down.

● Judgment Reference: 1. Grass, wood, bamboo chip, fiber, wire, plastic, sand, and other foreign objects. 2. Small veins detached from the shaft. 3. Broken shafts. 4. Wax covering separated from the bottom of immature feather. 5. Fragmented fibers, epidermis, shafts. 6. Left marrow from broken or detached shafts.