I-Nucleating agent ikhuthaza i-resin ukuthi icwebezele ngokunikeza i-nucleus yekristalu futhi yenza isakhiwo se-crystal grain sibe sincane, ngaleyo ndlela kuthuthukiswe ukuqina kwemikhiqizo, izinga lokushisa lokushintshashintsha kokushisa, ukuqina kobukhulu, ukucaca kanye nokukhanya.