It is very welcome you to our feather world.　Andersn is Asia premiere supplier in down and feather industry.　We supply the washed down and feather worldwide for manufacture that produces

Cleanliness Oxygen number is the test to determine the amount of foreign organic matter on the surface of the down and feather.　To qualify as “clean” the oxygen number must be less than 10.　Turbidity is the test to determine the amount of dust in feather and down products. The testing procedure： 1. Mix 10 grams down & feather with 1 liter of distilled water in a 2 liter jar. 2. Agitate jar until material begins to soak the water. 3. Put it on Horizontal shaker for 90 spm for 15 minutes shaking time. 4. Strain water from jar through a mesh (size 200) into a beaker. 5. Transfer water slowly into the turbidity tube.　The turbidity tube has “+” mark on the button . 6. Identify the exact point where the “+” mark is no longer visible. 7. Read the scale markings representing the mm of liquid in the tube. Clean products must have a turbidity of greater than 300mm.　There is a special requirements for claims of Hypo-allergenic or super-clean in the products advertising and the products is meeting the oxygen number must be 4.8 or less and turbidity must be 500 mm or greater.

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