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Heat & Pressure Sensitive Dyes

 Phthalide compounds, which are a type of colorless dye (color former), develop color via a ring-opening reaction when interacted with acids (developer), as shown in the following scheme. Because this reaction is reversible, decoloration occurs in a reversible manner under basic conditions.
 Pressure and heat sensitive recording systems utilize this color developing mechanism in which color formers, developers and sensitizers are intimately incorporated. In pressure sensitive recording, the coloration occurs as follows: Capsules containing color former are destroyed by pressure and the color former makes contact with the developer coated support material. In heat sensitive recording, both color former and developer, which are dispersed on the support material, are thermally melted, thus contacting each other to initiate the coloring reaction. Furthermore, a low melting point sensitizer is also added to achieve a high sensitivity. Recently, the technique has been applied to re-writable recording paper, which can be used for repeated writing and erasing. This technique has been applied to print on commuter passes or prepaid cards. By combining acid-generating methods with the coloring mechanism, new applications can be expected for these materials.
11 Results Found
View:  List
Product Number B0207
CAS RN 1249-97-4
Purity / Analysis Method: >96.0%(T)(HPLC)

Product Number B2675
CAS RN 155050-06-9
Purity / Analysis Method: >97.0%(T)(HPLC)

Product Number C1946
CAS RN 82137-81-3
Purity / Analysis Method: >97.0%(HPLC)(N)

Product Number C0741
CAS RN 1552-42-7
Purity / Analysis Method: >97.0%(T)(HPLC)

Product Number D3201
CAS RN 36499-49-7
Purity / Analysis Method: >98.0%(T)(HPLC)

Product Number D3205
CAS RN 36886-76-7
Purity / Analysis Method: >98.0%(HPLC)

Product Number D3204
CAS RN 34372-72-0
Purity / Analysis Method: >98.0%(T)(HPLC)

Product Number A3289
CAS RN 89331-94-2
Purity / Analysis Method: >98.0%(HPLC)

Product Number D3203
CAS RN 26628-47-7
Purity / Analysis Method: >98.0%(GC)(T)

Product Number D3202
CAS RN 21934-68-9
Purity / Analysis Method: >98.0%(T)(HPLC)

Product Number:   B0207 | Purity / Analysis Method:   >96.0%(T)(HPLC)

Product Number:   B2675 | Purity / Analysis Method:   >97.0%(T)(HPLC)

Product Number:   C1946 | Purity / Analysis Method:   >97.0%(HPLC)(N)

Product Number:   C0741 | Purity / Analysis Method:   >97.0%(T)(HPLC)

Product Number:   D3201 | Purity / Analysis Method:   >98.0%(T)(HPLC)

Product Number:   D3205 | Purity / Analysis Method:   >98.0%(HPLC)

Product Number:   D3204 | Purity / Analysis Method:   >98.0%(T)(HPLC)

Product Number:   A3289 | Purity / Analysis Method:   >98.0%(HPLC)

Product Number:   D3203 | Purity / Analysis Method:   >98.0%(GC)(T)

Product Number:   D3202 | Purity / Analysis Method:   >98.0%(T)(HPLC)