Oct 30, 1973u00a0u00b7 we claim 1. a self-opacifying frit composition for forming an adherent, acid-resistant vitreous enamel coating on cast iron having an opacity, as measured by l-value, of at least 85 percent, said frit composition consisting of the following components and concentrations, the latter in terms of percent by weight: Welcome to hayat water world the hayat factory is equipped with a number of innovative facilities to test and analyse the quality of water, mix fruit juices and produce all types of packaging and containers for the hayat product range. Matt frit for cast iron. it is a cast iron matt frit, one coat one fire ,can be applied to enamel cookware / stove grill. black frit for cast iron. it is a cast iron black frit, one coat one fire ,can be applied to cast iron frying pan / fireplace. Bfim locally manufactures the renowned anh range of refractory castables and wet mortars under license from harbison walker international, usa, and superfold tm /z blok ceramic fiber modules under license of thorpe products company usa. bfim also has more than 30 years of experience in refractory design, engineering, installation & thermal dry out for various furnaces in the kingdom.