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Studies in color sensitive photographic plates ands methods of sensitizing by bathing
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- Fig. 1. Spectrograms pf commercial and bathed plates
- Fig. 3. Spectrograph to study relative sensitiveness of plates and films
- Fig. 2. Diagram of spectrograph
- Fig. 4. Spectrograms showing the energy distribution of sunlight and of the tungsten lamp which was used in making the spectrograms to show the sensitizing action of the various dyes
- Fig. 5. Spectrograms (with sunlight as the source) of a commercial panchromatic plate with the filters used in the speed tests
- Fig. 6. Spectrograms showing the difference in the sensitizing of pinacyanol when used in baths of various composition
- Fig. 7. The effect of various quantities of ammonia added to a dye bath of water and alcohol
- Fig. 8. Keeping tests on plates sensitized with pinacyanil
- Fig. 9. Characteristic curves for freshly bathed plate (pinacyanol, water, alcohol, and ammonia)
- Fig. 10. Characteristic curves for old bathed plates (pinacyanol, water, alcohol, and ammonia)
- Fig. 11. Plates sensitized with pinacyanol and water
- Fig. 12. Plates sensitized with pinacyanol, water, alcohol, and ammonia
- Fig. 13. How effect of bathing with pinacyanol varies with the type of plate bathed
- Fig. 14. Spectrograms showing the difference in the sensitizing action of dicyanun when used in the baths of various composition
- Fig. 15. The comparison of commercial orthochromatic plates with a plate bathed with erythrosine shows that the latter is better than most commercial orthochromatic plates, but not as good as certain others
- Fig. 16. Orthochromatic sensitizers used in water bath with and without ammonia
- Fig. 16a. Pinachrome
- Fig. 18. Spectrograms showing increased sensitivity obtained washing panchromatic plates
- Fig. 17. Variation of speed and fog with time of keeping hypersensitized plates
- Fig. 19. Spectrum process plate, untreated
- Fig. 20. Spectrum process plate, washed in tap water for five minutes
- Fig. 21. Spectrum process plate, hypersensitized in water 100 CC, ammonia (20 per cent) 3.5 CC, and bathed four minutes
- Fig. 22. Drying cabinet
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