Reaction Steps
The color-developing agent may contain at least one of rhodamine B lactam, 6-diethylamino-benzo[a]fluoran, 3-diethylamino-benzo[a]fluoran, 3-diethylamino-7,8-benzo[a]fluoran, 9-diethylamino-benzo[a]fluoran, 3-diethylamino-7-chlorofluoran, 3,3-bis(1-n-butyl-2-methyl-indoyl-3)phthalate, 3,3-bis(1-ethyl-2-methyl-indoyl-3)phthalate, 3,6-bis(diethylamino)fluoran-γ-(4′-nitro) anilinolactam, 3-diethylamino-6-methyl-7-chlorofluoran, 2-bromine-3-methyl-6-dibutylaminofluoran, 1,3-dimethyl-6-diethylaminofluoran, 1,3,3-trimethyl-indolino-7′-chloro-β-naphthospiropyran, 3-cyclohexylamino-6-chlorofluoran, 2-(phenyliminoethanezyliden)-3,3-trimethylindoline, N-acetylauramine, N-phenylauramine, 2-{2-[4-(dodecyloxy)-3-methoxyphenyl]-ethenyl}quinoline, marachite green lactone, 3-diethylamino-7-dibenzoylaminofluoran, 3-diethylamino-7-chloroanilinofluoran, 3,6,5′-tri(diethylamino)fluorene-9-spiro-1′-(3′-isobenzofuran), 2,N,N-dibenzylamino-6-diethylaminofluoran, 3-(N,N-diethylamino)-7-(N,N-dibenzylamino)fluoran, 3-[2,2-bis(1-ethyl-2-methylindoyl-3)vinyl]-3-(4-diethylaminophenyl)-phthalide, 3,3-bis(4-diethylamino-2-ethoxyphenyl)-4-azaphthalide, crystal violet lactone, ethyl leuco methylene blue, methoxybenzoyl leuco methylene blue, di-β-naphthospiropyran, 3,3-bis(4-diethylaminophenyl)-6-diethylaminophthalide, 3-(4-diethylamino-2-ethoxyphenyl)-3-(1-ethyl-2-methylindoyl-3)-4-azaphthalide, 3-(4-diethylaminophenyl)-3-(1-ethyl-2-methylindoyl-3)-phthalide, 3-cyclohexylmethylamino-6-methyl-7-anilinofluoran, 3-diethylamino-6-methyl-7-anilinofluoran, 3-n-dibutylamino-6-methyl-7-anilinofluoran, 3-diethylamino-6-methyl-7-kylindenofluoran, 2-(2-chloroanilino)-6-diethylaminofluoran, 2-(2-chloroanilino)-6-dibutylaminofluoran, 2-anilino-3-methyl-6-diethyllaminofluoran, 2-anilino-3-methyl-6-dibutylaminofluoran, 6-diethylamino-3-methyl-2-(3-toluideno)-fluoran, 6-diethylamino-3-methyl-2-(2,4-kylindeno)-fluoran, 6-diethylamino-3-methyl-2-(2,6-kylindeno)-fluoran, trade name “S20” produced by Yamamoto Chemicals Inc., trade name “Red 8” produced by Yamamoto Chemicals Inc., trade name “Red 49” produced by Yamamoto Chemicals Inc., trade name “Red 520” produced by Yamada Chemical Co., Ltd., trade name “Red 100” produced by Hodogaya Chemical Co., Ltd., trade name “NC-Red-4” produced by Hodogaya Chemical Co., Ltd., trade name “NC-Red-6” produced by Hodogaya Chemical Co., Ltd., trade name “PSD-HP” produced by Nippon Soda Co., Ltd., trade name “Orange 100” produced by Yamada. Chemical Co., Ltd., trade name “Leuco Yellow” produced by Leuco, trade name “Green 300” produced by Yamada Chemical Co., Ltd., trade name “YK-ATP” produced by Yamamoto Chemicals Inc., trade name “Green 300” produced by Hodogaya Chemical Co., Ltd., trade name “Blue 200” produced by Hodogaya Chemical Co., Ltd., trade name “CVL. sp” produced by Hodogaya Chemical Co., Ltd., trade name “S205” produced by Yamada Chemical Co., Ltd., and trade name “Black 100” produced by Yamada Chemical Co., Ltd. Owing to this, at least red, orange, yellow, green, blue and black, also a mixed color thereof, for example, purple can be developed.
