In early modern times, gouache (defined as body color made opaque by the addition of white pigment) was used for manuscript illumination and transparent wash only for coloring pen and ink drawings. From these beginnings arose two distinct disciplines of transparent and opaque watercolor techniques.
Over the years the two are woven into a history with periods when artists embrace or reject their use individually or in mixed media application. While many brands premix whitener into their gouache color, M. Graham gouache relies on high pigment loads to produce body and opacity, leaving the addition of white to the discretion of the artist.
All colors, with the same name, are produced with identical pigments, whether watercolor, gouache, acrylic or oil, allowing a wider range of opportunity in media combination or under-painting.
Color shown here is for reference only.