>I have used white glue thinned in water to adhere watercolor onto canvas.
>It will take layers and be there when you are finished. It helps in
>preserving the light fastness.
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In essence..adding glue to watercolor is a bit like painting with acrylics I
would think. I find that interesting.
I used to mess with mixing egg yolks with watercolor once...trying a version
of the egg tempera method.
Back to acrylics, polymer as a clear acrylic is a type of adherent or glue
as well, (so again similiar to this glue idea with watercolor) and having a
gluing property to it I often use medium to glue canvas to masonite boards.
Acrylics too...can be used quite thinly with water to build up an image. In
fact, it can be fun to teach a version of the traditional versaccio or
grisalle method of a black and white underpainting in acryilcs...then going
over with thin acrylic washes to color it. For anyone interested in that, I
sat down with my son a couple Christmases ago at the kitchen table who
wanted me to help him get a handle on acrylics. He was somewhat a master of
watercolors at that time....I have a thread link here that shows that demo,
and the process for anyone interested-