Stone Lithography

levigate (levigator, levigation) = to grind to a fine smooth powder while in moist condition
planographic = from planography = a process of printing from a plane surface

labor intensive = needing a large workforce or a large amount of work in relation to output
gum arabic = a sticky substance obtained from the stems of several acacias, it can be dissolved in water, used especially in making adhesives, drugs, and candy
crayon = a pencil or stick of coloured chalk or wax, used for drawing
rosin = yellow resin (= sticky substance produced by certain trees and plants) that has become hard, used especially for soldering (soldered = joined with solder(=a low-melting alloy, especially one based on lead and tin or (for higher temperatures) on brass or silver, used for joining less fusible(=able to be melted) metals)
etch = to engrave (metal, glass, or stone) by coating it with a protective layer, drawing on it with a needle, and then covering it with acid to attack the parts the needle has exposed, especially in order to produce prints from it
frothing = forming of small bubbles that often rise to the surface
turpentine = a clear liquid that has a strong smell and is used for removing paint
desensitization = making something less sensitive