Claims
- 1. A photosensitive article comprising:
- A. an aluminum or aluminized substrate in the form of a film or sheet bearing on at least one aluminum or aluminized surface thereof a hydrophilic ceramic layer comprising (1) non-metallic inorganic particles and (2) a water-resistant phase, or phases, of a dehydration product of at least one monobasic phosphate; said ceramic layer having a thickness between 0.2 and 15 micrometers and
- B. a photosensitive lithographic coating over said ceramic layer.
- 2. The photosensitive article of claim 1 wherein a composition comprising an oligomeric diazonium resin is coated on said ceramic layer.
- 3. The photosensitive article of claim 1 wherein the cermic layer further comprises the reaction product of said at least one monobasic phosphate with said particles.
- 4. The photosensitive article of claim 1 wherein said particles comprise metal oxide particles having an average size of from 1.times.10.sup.-3 to 45 micrometers.
- 5. The photosensitive article of claim 4 wherein said lithographic coating comprises a polymerizable composition.
- 6. The photosensitive article of claim 4 wherein said ceramic layer has a thickness between 0.2 and 15 micrometers and said substrate is aluminum in the form of a film or sheet, and said lithographic coating comprises a positive acting o-quinone diazide in a polymeric binder.
- 7. The photosensitive article of claim 4 wherein said ceramic layer contains a reaction product of alumina with a monobasic phosphate and a reaction product of at least one metal oxide other than alumina with a monobasic phosphate, the orthophosphate of said at least one metal oxide being insoluble in an aqueous solution having a pH of from 6-12.
- 8. The photosensitive article of claim 4 wherein said particles are bound into an amorphous phase of aluminum phosphates formed by dehydration of monoaluminum phosphate.
- 9. The photosensitive article of claim 4 wherein said metal oxide particles comprises magnesia.
- 10. The photosensitive article of claim 4 wherein said metal oxide particles comprise alumina.
- 11. The photosensitive article of claim 10 wherein said ceramic layer has a thickness between 0.5 and 5 micrometers.
BACKGROUND OF THE INVENTION
This is a continuation-in-part of application Ser. No. 299,720, filed Sept. 8, 1981, now abandoned.
US Referenced Citations (8)
Non-Patent Literature Citations (3)
Entry |
Gonzalez et al., Bull. Am. Cer. Soc., vol. 59, No. 7, (1980), pp. 727-738. |
Morris et al., Chemical Society Reviews, 6(2), 1977, pp. 173-195. |
S. Wernick et al., "The Surface Treatment and Finishing of Aluminum and Its Alloys", 1972, pp. 33-38. |
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
299720 |
Sep 1981 |
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