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Old 07-09-09, 01:35 PM
Alessandra Kelley Alessandra Kelley is offline
Senior Member
Join Date: May 2003
Location: Chicago, Illinois USA
Posts: 417

While I believe dish soap would make paint adhere better to smooth surfaces, since it reduces surface tension, it probably isn't a good painting practice since it saponifies the paint (i.e. turns it into soap!) , which means that the paint will be more water-soluble and subject to washing off in later years.

Remember, advertising art, design and graphics were never meant to be permanent. When I was a student, I was really annoyed that while watercolors, intended for fine artists, had identified, relatively permanent pigments meant to last, gouache paints, intended for designers, had only color descriptions -- no ingredients list -- and a lot of bright but obviously impermanent pigments intended only for temporary advertising displays.

Surely there's a better way?
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