GB/T 10288-2016[Including 2020XG1] Test method for down and feather (English PDF)

4.1 Sampling method

One of the following methods can be selected to take specimen. The specimen

shall be representative.

4.2 Number of samples

The sampling quantity of bulk goods (including down and feather packaging

and down and feather product packaging) shall meet the requirements in Table

1.

4.3 Sampling requirements

4.3.1 Sampling method for down and feather. Samples are taken respectively

from the upper, middle, lower parts of a single package.

4.4 Test atmospheric conditions and sample balance

Component analysis, type identification, filling power test shall be carried out,

under constant temperature and humidity conditions. The atmospheric

conditions, which are used for the test, shall be carried out in accordance with

the provisions of GB/T 6529.The samples shall be balanced for 24 hours and

above. Other inspection items can be carried out, at room temperature OR

under actual conditions.

4.5 Specimen treatment

4.5.1 Instruments and equipment

Mixing tank, length (150 cm ~ 200 cm) × width (80 cm ~ 100 cm), depth (20 cm

~ 30 cm), height from the bottom to the ground (55 cm ~ 65 cm). It is made of

antistatic materials, such as wood or stainless steel.

4.5.2 Uniformity and reduction of samples

4.5.3 The number of specimens required for each inspection item

The number of specimens, which are required for each inspection item, shall

meet the requirements in Table 2.

5.1.4 Preliminary sorting

5.1.4.1 Operation method of preliminary sorting

Place the test specimen and seven beakers in the sorting box. Use tweezers to

pick out all kinds of feathers. Then use thumb and index finger, to flick the

feather, to remove other attached components. Respectively place the seven

components of complete waterfowl feathers, waterfowl damaged feather,

landfowl feather (including landfowl damaged feather and landfowl feather fiber),

long feather, quill feather, a mixture of down/down fiber/feather fiber, residues,

etc., in different containers.

5.1.4.2 Calculation of preliminary sorting

After sorting, weigh and record the mass of the contents in each container,

accurate to 0.0001 g.

5.1.5 Sorting and calculation of colored down and feather

5.1.5.1 Sorting method of colored down and feather

After the preliminary sorting is completed, the colored down and feather

(including colored down, down fiber, feather fiber, waterfowl feathers, waterfowl

damaged feather, landfowl feather, landfowl damaged feather, fiber), in each

component, are sorted out together. Weigh it (m3), accurate to 0.0001 g. Then

put the colored down and feather components back into the original

components.

5.1.5.2 Calculation of colored down and feather

Calculate the content of colored down and feather, according to formula (2).

The calculation result is expressed in %. It is rounded off to 0.1, according to

GB/T 8170.

5.1.6 Second sorting

5.1.6.1 Specimen preparation for the second sorting

Mix the mixture, which contains down/down fiber/feather fiber, in the mixing tank.

Use the "four-corner halving method", to take a representative specimen of

more than 0.2 g (accurate to 0.0001 g). Put the five and above containers in the

sorting box.

5.2 Type identification of goose and duck down

5.2.1 Instruments and equipment

5.2.1.1 Projector or microscope, 70X above.

5.2.1.2 Analytical balance, which has an accuracy of 0.0001 g.

5.2.1.3 Containers that can be used for weighing, such as beakers.

5.2.1.4 Tweezers.

5.2.2 Requirements

Specific requirements are as follows.

5.2.3 Preparation of specimen

5.2.3.1 The specimen preparation for the completion of the component analysis

test.

5.2.4 Operation method

Use tweezers to take out the down and feather. Sort them separately. Remove

the down and other things, which is sticking to the down or feather. Put them

under a projector or microscope, to carry out classified identification, according

to the relevant content of GSB 16-2763.Place the determined duck feather

(down), goose feather (down), "indistinguishable feather (down)" in the

container, respectively. Weigh and record the content of each container

(accurate to 0.0001 g). Calculate the percentage content, respectively.

5.2.5 Result calculation

5.2.5.3 Calculation of goose & duck down & feather which does not finish

component analysis test BUT only subject to type identification of down

and feather

5.3.1.6 Hair dryer. It has a rated power of 1500 W.

5.3.1.7 Electronic scale. The weighing pan size is above 20 cm × 20 cm; the

maximum weighing is above 3000 g, accurate to 0.1 g.

5.3.1.8 Stopwatch.

5.3.2 Preparation of specimen

5.3.2.1 Put 40 g of sample into the pre-treatment box. Use a wooden stick, to

gently break it up.

5.3.2.2 At the nozzle of the steam generator, which is 10 cm ~ 15 cm away from

the gauze of the pretreatment box, blow the steam into the pretreatment box,

5.3.2.3 Place the sample for 5 min ~ 10 min.

5.4 Oxygen number

5.4.1 Instruments and equipment

5.4.1.1 Horizontal oscillator. The frequency is (150 ± 2) times/min; the

oscillation amplitude is (40 ± 2) mm; it can be timing.

5.4.1.2 Magnetic stirrer.

5.4.1.3 Standard sieve, 150-mesh aperture, 6 cm height, 20 cm diameter.

5.4.1.4 Micro titration device. Micro burette or pipette, which has an accuracy

of 0.01 mL.

5.4.1.5 Stopwatch.

5.4.1.6 Wide-mouth plastic bottle, which can be sealed by a cap, has a capacity

of 2000 mL.

5.4.1.7 Triangular beaker. 250 mL.

5.4.1.8 Beaker. 1000 mL, 2000 mL.

5.4.1.9 Suction tube. 10 mL.

5.4.1.10 Measuring cylinder. 5 mL, 100 mL.

5.4.2 Reagents and materials

5.4.2.1 Sulfuric acid. 3 mol/L.

5.4.2.2 Potassium permanganate solution. 0.02 mol/L, which is prepared or

diluted according to GB/T 601; OR it is purchased standard solution.

The prepared solution shall be stored in a brown bottle AND protected from light.

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