I-agent ye-Nucleating ikhuthaza i-resin ukuba ibe yikristale ngokubonelela nge-crystal nucleus kwaye yenza ulwakhiwo lweenkozo zekristale lucokiseke, ngaloo ndlela luphucula ukuqina kweemveliso, ubushushu bokuphazamisa ubushushu, ukuzinza komlinganiselo, ukungafihli kunye nokukhazimla.