Acrylic paint has undergone considerable development since its introduction. Acrylic that could be thinned with solvent (Magna) was largely replaced by water soluble acrylics (Liquitex and Aqua-Tec) by the mid 60’s. This was followed by the development of translucent mediums (“gels”) which make possible painterly effects on a large scale. Acrylic gel offers the possibility of applying very thick and flexible translucent (and recently transparent) glazes, something not possible with oil paint. These developments have been accompanied by the introduction of pigments and pigment enhancers of considerable use to the abstract painter: pearlessence, metallic powders, and interference pigments.