Papers on paint and varnish and the materials used in their manufacture (1920)
Gardner, Henry A. (Henry Alfred), 1882- · Washington, D. C. · leaf 249
will be noticed that bubbles of air come from the pigments very rapidly at first and that this action grad- ually decreases and finally stops altogether. The time required for complete removal of air varies from one-half hour to tivo hours, depending upon the nature of the pigment. When no more… … Fig. 29 APPARATUS USED IN WORK. 246
Paint · Varnish and varnishing
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.