Record material using vinyl carbinol color formers
Record material utilizing a vinyl carbinol or derivative thereof
Recording material
Recording material
Recording material
Recording material
Recording material and method for producing the same
Recording material comprising chromogenic 3,1-benzoxazines
Recording material comprising crystal of fluoran compound
Recording material containing chromogenic 3,3-bisindolyl-4-azaph
Recording material containing leuco dye
Recording material containing leuco dye
Recording material containing leuco dye
Recording material employing chromogenic bisquinazolines
Recording system utilizing phthalide derivatives as colorless ch
Reversible thermosensitive coloring composition and a thermosens