Dry working black image compositions comprising organic halogen compounds and ethylene compounds

Abstract

This application describes a photosensitive composition which prints out directly as a black or near neutral image when exposed photographically and which has a greatly improved speed.

We claim: 
     
       1. A photosensitive composition comprising: (a) an organic halogen compound having at least three halogen atoms attached to a terminal carbon atom; and   (b) a substantially colorless ethylene compound represented by the formula ##STR5## wherein R 1  and R 2  each represent a p-dialkylaminophenyl group in which the alkyl groups are selected from the group consisting of methyl and ethyl, and each of R 3  and R 4  represents a monovalent material selected from the group consisting of H, halogen, alkyl, aryl, and other monovalent groups which do not interfere with the resonance of the ethylenic double bond connecting the two carbon atoms;   said constituents being present in proportions which yield a near neutral or black image when reacted with the products resulting from the photolytic exposure of said organic halogen compound; and   (c) a support for said composition.   
     
     
       2. The composition of claim 1 including at least one additional compound which enhances the formation of the direct printout image and which is selected from the group consisting of picoline-1-oxide, triaryl compounds of an element selected from the group consisting of Sb, As, Bi and P, and di-t-butyl-p-cresol. 
     
     
       3. The composition of claim 1 in which (b) is 1,1-bis-(p-dimethylaminophenyl) ethylene. 
     
     
       4. The composition of claim 1 wherein the constituents are   ______________________________________                                    
                        Mg                                                
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1,1-bis-p-dimethylaminophenyl ethylene                                    
                          1-100                                           
4-picoline-N-oxide        0.1-10                                          
Triphenylstibene          0.1-20                                          
2,6-di-t-butyl-p-cresol   0.1-50                                          
Iodoform                  100-1000                                        
______________________________________                                    
     
     
     
       5. The composition of claim 1 wherein the constituents are 1,1-bis-(p-dimethylaminophenyl) ethylene-50 mg.   Iodoform-200 mg.   4-Picoline-1-oxide-5 mg.   2,6-di-t-butyl-p-cresol-25 mg.   Triphenylstibine-10 mg.   Polystyrene 10% in benzene-3 cc.   Acetone-1 cc.   Benzene-1 cc.   
     
     
       6. A dry working photographic process which comprises preparing composition of claim 1 in a thin film; exposing said composition to a pattern of radiant energy, whereby a neutral or nearly black image prints out directly as a result of said exposure; and fixing said image in said composition by heating the same. 
     
     
       7. The photographic process of claim 4 wherein the thin film is given a blanket exposure to suitable radiation in the visible prior to exposing it to a pattern of radiant energy and the radiant energy to which it is then exposed has a wavelength greater than 6500 angstrom units. .Iadd. 8. A dry working photographic process according to claim 6 wherein said exposure comprises an exposure to the equivalent of 0.001 to 1.0 watt seconds/per square centimeter through a negative or positive original whereby an image prints out directly as the result of said exposure. .Iaddend..Iadd. 9. A dry working photographic process according to claim 6 wherein said exposure comprises an exposure of the photosensitive composition to the equivalent of 0.01 watt seconds/per square centimeter to 0.1 watt seconds/per square centimeter. .Iaddend..Iadd. 10. A dry working photographic process according to claim 6 wherein said heating of the photosensitive composition containing the image is for 5 to 10 minutes at 135° C to 150° C in moving air to fix the image. .Iaddend..Iadd. 11. A dry working photographic process according to claim 6 wherein said thin film comprising the photosensitive composition is coated on a substrate. .Iaddend.