無色染料(発色剤)の一種であるフルオラン化合物は，酸(顕色剤)と反応し，下式に示すように開環して発色します。この反応は可逆的で，アルカリ性条件下で元の無色染料に戻ります。

　感圧，感熱記録システムは，この発色機構を応用したもので，発色剤，顕色剤，増感剤などの材料が巧みに組み合わされています。感圧記録では，発色剤を内包したカプセルを加圧により破壊し，支持体に塗布した顕色剤と発色剤を接触させることにより発色させます。感熱記録では，支持体上に分散させた発色剤，顕色剤を熱により溶融，接触させることにより発色させます。また，高感度化のために低融点の増感剤が添加されています。最近では，繰り返しの書込み・消去が可能なリライタブル記録ペーパーといった分野での開発が進み，定期券やプリペイカードなどで実用化されています。様々な酸発生方法とこの発色機構を組み合わせることにより，新規な利用分野の開発が期待される材料です。

発色剤 / Color Former

顕色剤 / Developer

増感剤 / Sensitizer

発色剤 / Color Former

C1946	D3204	B2628
D3205	D3201	D3203
D3202	B0207	C0741

C1946	2'-(2-Chloroanilino)-6'-(dibutylamino)fluoran
D3204	2'-(Dibenzylamino)-6'-(diethylamino)fluoran
B2628	3',6'-Bis(diethylamino)-2-(4-nitrophenyl)spiro[isoindole-1,9'-xanthene]-3-one
D3205	3',6'-Dimethoxyfluoran
D3201	3-(1,2-Dimethyl-3-indolyl)-3-[4-(diethylamino)-2-methylphenyl]phthalide
D3203	6'-(Diethylamino)-1',2'-benzofluoran
D3202	6'-(Diethylamino)-1',3'-dimethylfluoran
B0207	Benzoyl Leuco Methylene Blue
C0741	Crystal Violet Lactone

顕色剤 / Developer

M1410	T1254	B2752
B2753	B1568	B2664
N0026	B0813	B2750
B2749	B2748	B2751
B1567	B0494	T2259
N0027	D3267	E0664
H1166	B0464	D2121
B0819	E0432	M1684
T0144	P0201	B0735
B1715	B1563	T1428
H0209	D1356	B0495
H0216	R0008	T0032

M1410	1,1'-Methylenedi-2-naphthol
T1254	1,1,1-Tris(4-hydroxyphenyl)ethane
B2752	1,1-Bis(3-cyclohexyl-4-hydroxyphenyl)cyclohexane
B2753	1,1-Bis(4-hydroxy-3-methylphenyl)cyclohexane
B1568	1,1-Bis(4-hydroxyphenyl)cyclohexane
B2664	1,3-Bis[2-(4-hydroxyphenyl)-2-propyl]benzene
N0026	1-Naphthol
B0813	2,2'-Biphenol
B2750	2,2-Bis(2-hydroxy-5-biphenylyl)propane
B2749	2,2-Bis(3-cyclohexyl-4-hydroxyphenyl)propane
B2748	2,2-Bis(3-sec-butyl-4-hydroxyphenyl)propane
B2751	2,2-Bis(4-hydroxy-3-isopropylphenyl)propane
B1567	2,2-Bis(4-hydroxy-3-methylphenyl)propane
B0494	2,2-Bis(4-hydroxyphenyl)propane
T2259	2,3,4-Trihydroxydiphenylmethane
N0027	2-Naphthol
D3267	4,4'-(1,3-Dimethylbutylidene)diphenol
E0664	4,4'-(2-Ethylhexylidene)diphenol
H1166	4,4'-(2-Hydroxybenzylidene)bis(2,3,6-trimethylphenol)
B0464	4,4'-Biphenol
D2121	4,4'-Dihydroxydiphenyl Ether
B0819	4,4'-Dihydroxydiphenylmethane
E0432	4,4'-Ethylidenebisphenol
M1684	4,4'-Methylenebis(2-methylphenol)
T0144	4-(1,1,3,3-Tetramethylbutyl)phenol
P0201	4-Phenylphenol
B0735	4-tert-Butylphenol Zone Refined (number of passes:19)
B1715	9,9-Bis(4-hydroxyphenyl)fluorene
B1563	alpha,alpha'-Bis(4-hydroxyphenyl)-1,4-diisopropylbenzene
T1428	alpha,alpha,alpha'-Tris(4-hydroxyphenyl)-1-ethyl-4-isopropylbenzene
H0209	Benzyl 4-Hydroxybenzoate
D1356	Bis(4-hydroxyphenyl) Sulfide
B0495	Bis(4-hydroxyphenyl) Sulfone
H0216	Methyl 4-Hydroxybenzoate
R0008	Resorcinol
T0032	Tetrabromobisphenol A

増感剤 / Sensitizer

D0910	D0159	D2017
D1598	B1519	B1248
B1619	D0001	T0015
C0043	P0231	D0866
F0016	F0017	H0067
C0024	L0011	T0018
H0283	M0476	O0238
O0107	P0002	H0797
S0075	S0314

D0910	1,3-Diphenyl-1,3-propanedione
D0159	1,4-Dibenzyloxybenzene
D2017	1,4-Diphenoxybenzene
D1598	2,6-Diisopropylnaphthalene
B1519	4-Benzylbiphenyl
B1248	Behenic Acid
B1619	Benzyl 2-Naphthyl Ether
D0001	Dibenzyl Sulfoxide
T0015	Dimethyl Terephthalate
C0043	Diphenyl Carbonate
P0231	Diphenyl Sulfone
D0866	Ethylene Glycol Diphenyl Ether
F0016	Fluoranthene
F0017	Fluorene
H0067	Hexadecanamide
C0024	Hexanamide
L0011	Lauric Acid
T0018	m-Terphenyl
H0283	Methyl 3-Hydroxy-2-naphthoate
M0476	Myristic Acid
O0238	n-Octanamide
O0107	Oleamide
P0002	Palmitic Acid
H0797	Phenyl 1-Hydroxy-2-naphthoate
S0075	Stearamide
S0314	Stearanilide