Free Radical Photography.
Abstract
Two types of free radical film systems, designated as vinylidene and styryl, respectively, were prepared for argon ion laser recording applications. Vinylidene films produce blue images on a pale yellow background, while the styryl films give magenta imagery on yellow backgrounds. Latent imagery may be optically developed by exposure to red-near infrared radiation and fixing is accomplished by heating the film to 170 C for one minute. No reciprocity failure was noted from exposures with a scanning laser beam even when spot dwell times of 10 to the -9th power seconds were employed. Laboratory samples of these films produced net unit density from exposures of 12-17 ergs/sq cm. Although the practicality of these films and the processing concept have been established for argon ion laser recording at 488 nm, additional work is required to improve the shelf life, quality of machine coatings and processing technology. Preliminary machine coating studies resulted in the preparation of a vinylidene pilot coating which required 50-55 ergs/sq cm for net D=1. after 4 minutes of development with red radiation and fixing for 1 minute at 170 C; a styryl pilot coating required 225-260 ergs/sq cm for net D=1 using similar processing conditions. Coating conditions for these preliminary efforts were not optimized and only unpurified ingredients were employed. A camera working styryl film was also prepared which exhibited a speed of 0.9-1.2 ASA.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1972
- Accession Number
- AD0894911
Entities
People
- Andrew C. Hazy
- John E. Shirey