Clockwise from bottom: acrylic, hide glue with natural pigment, hide glue with natural pigment and food color, hide glue with pigment and alum, and hide glue with pigment, food color and alum.
After an hour's soak and a little rubbing.
Wow! All the hide glue patterns washed out to the point of being barely noticeable, regardless of alum content. Either I'm missing some information, or this is just to be expected - if historical paintwork was done in this way at all.
No comments:
Post a Comment