Simple Chemistry Of Mill Additions & Their Purpose

It is well known that normal sheet or cast iron enamel slurries consist of frit, clay or other suspending agents, electrolytes or "setting up" agents, possibly opacifiers, colours and refractories such as quartz and water. In this paper it is intended to explain the reasons for such additions as simply as possible, although it should be appreciated that the true and thorough explanation would involve a more comprehensive knowledge of such branches of chemistry and physics, as colloids. The author also hopes to highlight a few enamel properties affected by mill additions.