What is the fine-grained topic of the following text: Pergopak products help formulators of industrial coatings, inks and overprint varnishes to achieve a higher performing balance of low gloss, rheology, abrasion resistance, coin-marking, water resistance, chemical resistance, heat resistance and soft feel - that they are unable to achieve with silica or wax flatting agents alone. Only return the topic.
Use of Pergopak products in improving industrial coatings, inks and overprint varnishes