What is a style of painting on plastered walls or stone, in which the colors are rendered permanent by sprinklings of water, in which is mixed a proportion of soluble glass (a silicate of soda) called?

stereochromy — A style of painting on plastered walls or stone, in which the colors are rendered permanent by sprinklings of water, in which is mixed a proportion of soluble glass (a silicate of soda). (Webster's 1913.)

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