| 摘要 |
This invention is directed to a method of preparing a light sensitive vesicular imaging film wherein two resin solutions, at the threshold of compatibility but having a common or miscible solvents, each containing a sensitizer which liberates gas on irradiation are mutually dispersed, coated as a thin film and dried. The thermoplastic film comprises an intimate dispersion of one hydrophobic resin in the other hydrophobic resin with the sensitizer essentially uniformly dispersed throughout. After irradiation with a pattern of actinic light, gas released in the selected areas may be developed by overall heating to a visible record. The vesicular image in this two phase hydrophobic composition is of particularly high density and thermal stability.
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