" Rubber compounding ingredient--Carbon black, pelletized--Specification"
" Rubber compounding ingredients--Carbon black, pelletized--Determination of mass strength"
" Rubber compounding ingredients--Carbon black, pelletized--Determination of pellet atrition"
" Rubber compounding ingredients--Carbon black, pelletized--Determination of fines content"
" Rubber compounding ingredients--Carbon black, pelletized--Determination of pellet size distribution"
Then there's the handling, something that's simplified when the end-product is basically pelletized material.
" Rubber compounding ingredients--Carbon black, pelletized--Determination of individual pellet crushing strength"