This invention relates to {HEAD ~ abrasive compositions} useful in preparing {TAIL ~ purge compositions} for purging plastics processing equipment comprising: at least one abrasive powder comprising a major amount of calcium carbonate; at least one organic rosin material; and at least one surfactant 
useful in preparing
This invention relates to { HEAD ~ abrasive compositions } useful in preparing { TAIL ~ purge compositions } for purging plastics processing equipment comprising : at least one abrasive powder comprising a major amount of calcium carbonate ; at least one organic rosin material ; and at least one surfactant
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