I'm Czech and I'm translating a school syllabus for pottery classes. I need some help.
Is there a word in English for:
This shape which you get after centering and opening clay ( in Czech: "the basic shape"):
additives which make a clay body lighter because they burn out (e.g. peat, starch, sawdust,..) in Czech they are called "lighteners"
paints which are used on glaze fired pots and then fired again at 1,200 - 1,300 °C, very resistant on glaze paints. (in Czech something like "melt-in paints")
Finally, is there an expression like "outer hand" and "inner hand"