The business record 1 wherein said initially colorless coatings comprise self contained coatings of color formers and color developers in which {HEAD ~ either said color formers} or {TAIL ~ said color developers} are contained in pressure rupturable microcapsules 
The business record 1 wherein said initially colorless coatings comprise self contained coatings of color formers and color developers in which { HEAD ~ either said color formers } or { TAIL ~ said color developers } are contained in pressure rupturable microcapsules
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