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- TABLE DES MATIÈRES
- TABLE DES ILLUSTRATIONS
- RECHERCHE DANS LE DOCUMENT
- TEXTE OCÉRISÉ
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- PAGE DE TITRE
- CONTENTS (p.353)
- I. Introduction (p.353)
- II. General information (p.355)
- III. Methods of studying color sensitiveness (p.357)
- IV. Pinacyanol (p.360)
- V. Dicyanin (p.366)
- VI. Orthochromatic sensitizers (p.367)
- VII. Hypersensitizing commercial panchromatic plates (p.368)
- VIII. Increase in speed by washing before exposure (p.369)
- IX. The technique of plate bathing (p.372)
- X. Procedure and formulas (p.373)
- XI. Summary (p.374)
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- Première image
- PAGE DE TITRE
- Fig. 1. Spectrograms pf commercial and bathed plates (pl.1)
- Fig. 3. Spectrograph to study relative sensitiveness of plates and films (pl.2)
- Fig. 2. Diagram of spectrograph (p.357)
- 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 (pl.3)
- Fig. 5. Spectrograms (with sunlight as the source) of a commercial panchromatic plate with the filters used in the speed tests (pl.3)
- Fig. 6. Spectrograms showing the difference in the sensitizing of pinacyanol when used in baths of various composition (pl.4)
- Fig. 7. The effect of various quantities of ammonia added to a dye bath of water and alcohol (pl.4)
- Fig. 8. Keeping tests on plates sensitized with pinacyanil (p.363)
- Fig. 9. Characteristic curves for freshly bathed plate (pinacyanol, water, alcohol, and ammonia) (p.364)
- Fig. 10. Characteristic curves for old bathed plates (pinacyanol, water, alcohol, and ammonia) (p.364)
- Fig. 11. Plates sensitized with pinacyanol and water (p.365)
- Fig. 12. Plates sensitized with pinacyanol, water, alcohol, and ammonia (p.365)
- Fig. 13. How effect of bathing with pinacyanol varies with the type of plate bathed (pl.5)
- Fig. 14. Spectrograms showing the difference in the sensitizing action of dicyanun when used in the baths of various composition (pl.5)
- 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 (pl.6)
- Fig. 16. Orthochromatic sensitizers used in water bath with and without ammonia (pl.6)
- Fig. 16a. Pinachrome (pl.7)
- Fig. 18. Spectrograms showing increased sensitivity obtained washing panchromatic plates (pl.7)
- Fig. 17. Variation of speed and fog with time of keeping hypersensitized plates (p.369)
- Fig. 19. Spectrum process plate, untreated (p.370)
- Fig. 20. Spectrum process plate, washed in tap water for five minutes (p.370)
- Fig. 21. Spectrum process plate, hypersensitized in water 100 CC, ammonia (20 per cent) 3.5 CC, and bathed four minutes (p.371)
- Fig. 22. Drying cabinet (p.372)
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DEPARTMENT OF COMMERCE
Scientific Papers
OF THE
Bureau of Standards
S. W. STRATTON. Director
No. 422
STUDIES IN COLOR SENSITIVE PHOTOGRAPHIC PLATES AND METHODS OF SENSITIZING BY BATHING
FRANCIS M. WALTERS, Jr.
Associate Physicist
RAYMOND DAVIS
Photographic Technologist
Bureau of Standards
NOVEMBER 15, 1921
PRICE, 15 CERTS
Sold only by the Superintendent of Documents, Government Printing Office * Washington, D. C.
WASHINGTON
GOVERNMENT PRINTING OFFICE 1921
Le texte affiché peut comporter un certain nombre d'erreurs. En effet, le mode texte de ce document a été généré de façon automatique par un programme de reconnaissance optique de caractères (OCR). Le taux de reconnaissance estimé pour cette page est de 99,35 %.
La langue de reconnaissance de l'OCR est l'Anglais.
Scientific Papers
OF THE
Bureau of Standards
S. W. STRATTON. Director
No. 422
STUDIES IN COLOR SENSITIVE PHOTOGRAPHIC PLATES AND METHODS OF SENSITIZING BY BATHING
FRANCIS M. WALTERS, Jr.
Associate Physicist
RAYMOND DAVIS
Photographic Technologist
Bureau of Standards
NOVEMBER 15, 1921
PRICE, 15 CERTS
Sold only by the Superintendent of Documents, Government Printing Office * Washington, D. C.
WASHINGTON
GOVERNMENT PRINTING OFFICE 1921
Le texte affiché peut comporter un certain nombre d'erreurs. En effet, le mode texte de ce document a été généré de façon automatique par un programme de reconnaissance optique de caractères (OCR). Le taux de reconnaissance estimé pour cette page est de 99,35 %.
La langue de reconnaissance de l'OCR est l'Anglais.