CURRENT TRENDS of Cationic Coating Production Methods and Apparatus Upon Paper,Packaging and Textiles

摘要

In the ancient civilizations in and around the Medi-terranean,artisans used vegetable oils as the work-ing medium for painting.Air-drying paint formula-tions using oils of castor,hempseed,pine nut,poppy and walnut have been recorded.Linseed oil generally was not used due to its tendency to slowly dry.darken and crack over time,unlike mastic and waxes.Once thick-crack over time,unlike mastic and waxes.Once thick-ened,the oils became resinous and could be used as a varnish to seal and protect artisans'paintings from water.