Speaking as someone with virtually no knowledge of painting, these terms are all the same to me. >How do you feel about calling both tempera and gouache "opaque >watercolor" ? I've seen this at more and more museums/galleries >lately. Your feedback will be appreciated. >Thank you, Deborah Cohen Sharyn Horowitz, The Health Museum of Cleveland [log in to unmask] 8911 Euclid Avenue Cleveland, OH 44160 (216) 231-5010 fax 216-231-5129