Product List

Color Formers

Our main products, color formers, are materials characterized by a chromogenic reversible reaction when met with acids. They were first adopted to pressure sensitive recording paper (non-carbon paper) and then to thermosensitive recording paper (thermal recording paper). Thermosensitive recording paper found its way from its original application to FAX paper, and expanded widely to bank ATM and cash register recording paper, labels for food and commodity distribution, traffic tickets, admission tickets, lotteries, etc. Such applications utilize one of the color former’s reversible chemical characteristics, which is to form colors by reacting with acids, however, recent technology is focused on utilizing the intrinsic reversible characteristic of color formers, from non-colored to colored and from the colored to non-colored, such as for thermo chromic materials, rewritable thermosensitive paper, erasable toner. etc.
Color formers are everywhere in our daily life although they may not be noticeable to everyone. We are committed to continue to offer new products, not only color formers, but also products that will make life richer and more convenient, as well as environmentally friendly products, by capitalizing on our expertise and experiences in designing and elaborating color formers.

Product Name CAS No. Family Color Molecular weight Melting Point
(℃)
λmax
(nm)
GREEN 300 34372-72-0 Fluoran green 566 173-175 462
605
H-1046 140895-67-6 Fluoran green 556 206-209 477
675
CVL 1552-42-7 Phthalide blue 415 178-180 602
BLUE 203 98660-18-5 Pyridine
Blue
blue 539 153-157 580
BLUE 220 114090-18-5 Pyridine
Blue
blue 453 149-151 606
BLMB 1249-97-4 Pheno-
thiazine
blue 389 192-195 660
RED 500 115392-27-3 Fluoran red 463 173-175 523
RED 520 42228-32-0 Fluoran red 447 165-167 518
RED 550 117342-26-4 Fluoran red 520 178-179 501
S-205 70516-41-5 Fluoran black 518 164-166 452
590
BLACK 305 129473-78-5 Fluoran black 560 181-182 453
588
BLACK 400 89331-94-2 Fluoran black 532 182-183.5 455
592
ETAC 59129-79-2 Fluoran black 538 206-208 460
595
BLACK 100 68134-61-2 Fluoran black 530 179-181 435
585
NIR BLACK 78 113915-68-7 Divinyl
Phthalide
black 774 130-135 580
890