Gouache or tempera has been used since medieval times, at which time it
was known as temple paint. It is often confused with watercolors, since both
techniques are applied in a similar manner. The difference, however, is that
gouache is heavier and more opaque. It is applied using layers and veils (diluted).
And, in contrast with watercolors, the darker tones can be applied first or over
these the lighter ones or even white. This means that despite its matte finish, it
is the perfect technique for illustrating reflections and intense highlights for
elements like glasses, jewelry, gems, or metals. It dries quite quickly and, once
dried, errors can be corrected by superimposing layers, bearing in mind that if
the layer is too thick it may crack. The materials used for this technique are: a
heavy paper, recipients with water, a palette for mixing the colors, and brushes
of different thickness, depending on the level of detail that needs to be achieved.
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