Producing a multi-color image in polychromatic glass

Claim 1

An improved method of producing a multicolor image in polychromatic glass wherein the glass is initially exposed to develop a latent image, then heat treated to develop nuclei, and thereafter further exposed and heat treated to develop a full color image, characterized in that the initial exposure is made through at least one high contrast film positive embodying a subject pattern in the form of a half tone transparency, and being further characterized by the fact that the film positive, through which the glass is exposed, covers less than the total glass surface, and the remainder of the glass surface remains masked throughout the glass processing.

Claim 4

A method of producing a multicolor image in polychromatic glass which comprises producing a set of continuous tone, black and white, color separation negatives, wherein each negative corresponds to a selected primary color to be reproduced in the glass, by individually and separately photographing the original subject through a series of color filters, each filter corresponding to a selected color for reproduction, copying each continuous tone, black and white negative thus produced through a half tone type screen onto a high contrast film to form a screened positive transparency corresponding to each negative, individually and sequentially exposing the polychromatic glass through each such positive transparency for a time sufficient to produce the polychromatic glass color nearest to that of the color separation filter, thus producing a latent image composed of distinct pattern arrays corresponding in number to the selected colors and corresponding separation negatives, thereafter heat treating and reexposing the glass to develop the desired multi-color image.

Claim 5

A method of producing a multicolor image in polychromatic glass which comprises producing a set of continuous tone, black and white, color separation negatives, wherein each negative corresponds to a selected primary color to be reproduced in the glass, by individually and separately photographing the original subject through a series of color filters, each filter corresponding to a selected color for reproduction, copying each continuous tone, black and white negative thus produced through a half tone type screen onto a high contrast film to form a screened positive transparency corresponding to each negative, individually and sequentially exposing the polychromatic glass through each such positive transparency for a time sufficient to produce the polychromatic glass color nearest to that of the color separation filter, thus producing a latent image composed of distinct pattern arrays corresponding in number to the selected colors and corresponding separation negatives, thereafter heat treating and reexposing the glass to develop the desired multi-color image.

Claim 8

A method of producing an image composed of N colors in polychromatic glass which comprises producing N continuous tone, color separation negatives by recording an image of each color component in the original subject on a separate black and white panchromatic film by photographing the original through a corresponding color filter which absorbs substantially the entire color spectrum except for the selected color or radiation zone, mounting one of such color separation negatives and a high contrast film on opposite sides of a half tone type screen and flooding the negative with white light to convert the high contrast film to a positive mask containing a dot pattern image therein that corresponds in area to the image in the color separation negative, the remainder of the film being opaque, repeating such process with each color separation negative to produce N high contrast film positives, individually and sequentially exposing the polychromatic glass through each such positive transparency for a predetermined time necessary to develop in the polychromatic glass a latent color corresponding to that recorded in the transparency, thereafter heat treating, reexposing and reheating the glass to develop the multicolor image.

Claim 9

A method of producing an image composed of N colors in polychromatic glass which comprises producing N continuous tone, color separation negatives by recording an image of each color component in the original subject on a separate black and white panchromatic film by photographing the original through a corresponding color filter which absorbs substantially the entire color spectrum except for the selected color or radiation zone, mounting one of such color separation negatives and a high contrast film on opposite sides of a half tone type screen and flooding the negative with white light to convert the high contrast film to a positive mask containing a dot pattern image therein that corresponds in area to the image in the color separation negative, the remainder of the film being opaque, repeating such process with each color separation negative to produce N high contrast film positives, individually and sequentially exposing the polychromatic glass through each such positive transparency for a predetermined time necessary to develop in the polychromatic glass a latent color corresponding to that recorded in the transparency, thereafter heat treating, reexposing and reheating the glass to develop the multicolor image.