watercolors work by staining the surface to which they are applied.
One gradually builds up glazes of transparent stain, working
from light to dark. Highlight areas must be avoided or masked
on the other hand, works by creating opaque layers of color
that lay atop the surface. Its covering power allows for the
layering of lighter tones over darker ones. This quality fosters
an approach to painting that is similar to working with other
opaque media. However, gouache differs from oils and acrylics
in ways that distinctly set it apart.
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