JOURNAL OF PRAUDEN

How to Identify Species (under KS K 0820)
2018-09-21

1. Collecting Specimens

1) Specimens with compositions classified: Randomized specimen collected from a box of mixed down clusters and feathers, classified.

2) Specimens with no composition test passed: Randomized specimen collected from a box of 30g-down clusters and feathers, by 1g from Top / Middle / Bottom layers of the box

2. Test of Identification

1) For Down Clusters

① Collect randomly (to have both large and small clusters) a total of 50 down clusters out of a box.
② Remove alien substances by shaking the collected down clusters in the air. This will improve test accuracy.
③ Identify using analyzer or microscope, and put the down clusters in a beaker.
④ Remove unidentifiable down clusters, and collect again as many down clusters out of a box.
⑤ If 7 or more duck downs (14+%) are identified, repeat ① to have a total of 100 down clusters identified.

2) For Feathers

① Collect randomly (to have both large and small feathers) a total of 20 feathers out of a box.
② Perform ② through ④ of the test of identification for down clusters.
⑤ If 4 or more duck downs (20+%) are identified, repeat ① to have a total of 40 feathers identified.

3. Representation of Results

1) For specimens with compositions classified (1-1): Results for both down clusters and feathers for goose down, duck down and chicken feathers, exclusive of residues, immature down clusters, fibers, chicken feathers and damaged feathers.

2) For specimens with no composition test passed (1-2): Measure to the nearest tenth of a percentage point down clusters and feathers of goose, duck and chicken

* Microscopic View of Specimen Difference

<Source: Down and Feather Testing (KS K 0820 2014)>