What is "flatting mill"

Flatting \Flat"ting\, n.

1. The process or operation of making flat, as a cylinder of glass by opening it out.

2. A mode of painting,in which the paint, being mixed with turpentine, leaves the work without gloss.
   --Gwilt.

3. A method of preserving gilding unburnished, by touching with size.
   --Knolles.

4. The process of forming metal into sheets by passing it between rolls. Flatting coat, a coat of paint so put on as to have no gloss. Flatting furnace. Same as flattening oven, under Flatten. Flatting mill.

   1. A rolling mill producing sheet metal; esp., in mints, the mill producing the ribbon from which the planchets are punched.

   2. A mill in which grains of metal are flatted by steel rolls, and reduced to metallic dust, used for purposes of ornamentation.