A water thinned protein-based paint that dries to a water resistant film. Glue temperas use casein or gelatin often as an emulsion mixed with oil. These paints dry to a semi-matt appearance by the evaporation of water. Glycerine or other humectants were often added to reduce cracking. Formalin was sometimes added to produce a hard insoluble film.
Sources Checked for Data in Record
- Website address 1 Comment: D. van der Reyden "Identifying the Real Thing" www.scmre.org/analysis.htm