Wopanda kanthu amaponyedwa ndi mchenga wa alkali phenolic resin kapena sodium silicate-bonded san process.Kulimba kwapamadzi kumafika pang'ono HRC48-58 ndi kuuma kwakuya pakati pa 4-6mm(HRC45), pambuyo pochita chithandizo cha kutentha. kukana pansi pa zovuta zogwirira ntchito.