Claims
- 1. A developer sheet useful in forming images having a high density comprising a support having front and back surfaces; and
- a developer layer coated from a solution on said front surface, said developer layer comprising a particulate reactive material selected from the group consisting of acid clays, aromatic carboxylic acids and polyvalent metal salts thereof, phenolic resins and polyvalent metal salts thereof, polymers of aromatic carboxylic acids with aldehydes or acetylene and polyvalent metal salts thereof, and organic acids and polyvalent metal salts thereof; a binder material selected from the group consisting of polyvinyl alcohol, maleic anhydride styrene copolymer, starch and gum arabic; and from 0.01 to 1.0 parts of sodium or ammonium alginate per 100 parts of particulate reactive materials.
- 2. The developer sheet according to claim 1 wherein said support is a polymeric film.
- 3. The developer sheet according to claim 2 wherein said support is polyethylene terephthalate.
- 4. The developer sheet according to claim 1 wherein said support is paper.
- 5. The developer sheet according to claim 1 wherein said developer is a phenolic resin or a polyvalent metal salt thereof.
- 6. The developer sheet of claim 1 wherein said developer is a polyvalent metal salt of a salicylic acid.
- 7. The developer sheet according to claim 1 wherein the amount of said alginate in said developer layer ranges from about 0.05 parts to about 1.0 parts per 100 parts of developer.
- 8. A microencapsulated imaging system comprising:
- an imaging sheet comprising a support having a layer of photosensitive microcapsules on the surface thereof, said microcapsules containing a photohardenable or photosoftenable composition as the internal phase and having a chromogenic material associated therewith; and
- a developer sheet comprising a support having front and back surfaces and a developer layer coated from a solution on said front surface, said developer layer comprising a particulate reactive material selected from the group consisting of acid clays, aromatic carboxylic acids and polyvalent metal salts thereof, phenolic resins and polyvalent metal salts thereof, polymers of aromatic carboxylic acids with aldehydes or acetylene and polyvalent metal salts thereof, and organic acids and polyvalent metal salts thereof; a binder material selected from the group consisting of polyvinyl alcohol, maleic anhydride styrene copolymer, starch and gum arabic; and from 0.01 to 1.0 parts of sodium or ammonium alginate per 100 parts of particulate reactive materials;
- wherein said chromogenic material and said particulate reactive material are capable of reacting to form a visible image on said developer sheet.
- 9. The imaging system according to claim 8 wherein said photohardenable or photosoftenable composition comprises a photohardenable composition including an ethylenically unsaturated monomer and a photoinitiator.
- 10. The imaging system according to claim 9 wherein the support of said developer sheet is a polymeric film.
- 11. The imaging system according to claim 10 wherein said polymeric film is polyethylene terephthalate.
- 12. The imaging system according to claim 9 wherein the support is paper.
- 13. The imaging system according to claim 9 wherein said developer is a phenolic resin or a polyvalent metal salt thereof.
- 14. The imaging system according to claim 9 wherein said developer is a polyvalent metal salt of salicylic acid.
- 15. The imaging system according to claim 9 wherein the amount of said alginate in said developer layer ranges from about 0.05 parts to about 1.0 parts per 100 parts of developer.
Parent Case Info
This is a continuation of copending application Ser. No. 340,615, filed Apr. 19, 1989 now abandoned.
US Referenced Citations (6)
Non-Patent Literature Citations (2)
Entry |
Shelendich, "High-Rate Drying of Aqueous Air-Knife Coatings", TAPPI, 55, No. 3, pp. 420-423, 1972 (Abstract). |
Fairchild et al., "Controlling Migration in Paper and Board Coatings", Invest. Tec. Papel 5, No. 15, pp. 53-72, 1968 (Abstract). |
Continuations (1)
|
Number |
Date |
Country |
Parent |
340615 |
Apr 1989 |
|