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Significance and Use
4.1 Individual pellet hardness is related to several carbon black characteristics. Among these are mass strength and attrition. The subsequent level of dispersion obtained in some mixed compounds containing the carbon black may be affected by pellet hardness. Acceptable pellet hardness must be agreed to by the user and the producer.
1.1 This test method covers a procedure for measuring individual pellet hardness of carbon black by the automated pellet hardness tester.2
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
D1511 Test Method for Carbon Black--Pellet Size Distribution
D1799 Practice for Carbon Black--Sampling Packaged Shipments
D1900 Practice for Carbon Black--Sampling Bulk Shipments
D4483 Practice for Evaluating Precision for Test Method Standards in the Rubber and Carbon Black Manufacturing Industries
E11 Specification for Woven Wire Test Sieve Cloth and Test Sieves
ICS Number Code 83.040.20 (Rubber compounding ingredients)
UNSPSC Code 12171603(Carbon black)