If your talking in color such as dark colors and light colors, i would say dark colors. I did this experiment once and the darker water evaporated faster in sunlight because dark colors absorb alot of the suns rays.we will be mixing watercolor pencil pigments with glue. Water based PVA (white glue) can be colored using water based media, to use as a filler for small voids, gluing particularly conspicuous parts together or smoothing edge seams in paper models.
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