GB/T 3780.12-2007Carbon black - Part 12: Inspection of impurity material (English PDF)

4.1

Test sieve, sieve with a bronze or stainless steel, the basic mesh size 850µm, in line with GB/T 6003.1 regulations.

4.2

brush, flat, long hair >=2cm.

4.3

scales, precision 5g.

4.4

funnel stainless steel funnel catchy with an inner diameter of the outer diameter test sieves in close agreement, under the funnel cone mouth in close agreement with black packing containers.

4.5

container capacity of 1000cm3 wide-mouth glass jar or other suitable container.

5.1

Carbon black bagged by GB 3778, GB/T 3782, the relevant provisions of GB/T 7044 will be.

5.2

bulk carbon black according to the provisions of HG/T 2725's.

Step 6 Analysis 6.1 The test sieve (4.1) placed in a funnel catchy, lower cone funnel inserted into the container mouth (4.5).

6.2

with the scales weighed about 500g samples, accurate to 5g, is poured into the test sieve.

6.3

brush gently brushing the carbon black sample, until all the carbon black sample through the screen up, pass the screen (that is to remain in the web) non

Carbon black is the substance impurities.

6.4

decanted impurities, with the naked eye, and hand types (hard carbon, sand, rust, etc.) pressure, magnet and other methods for the identification of impurities.