US1573478A

US1573478A - Photographic print and method of making the same

Info

Publication number: US1573478A
Application number: US65045A
Authority: US
Inventors: Charles W Carman
Original assignee: Individual
Current assignee: Individual
Priority date: 1925-10-26
Filing date: 1925-10-26
Publication date: 1926-02-16
Anticipated expiration: 1943-02-16

Description

Patented Feb. 16, 1926.

UNITED STATES PATENT OFFICE.

oHAnLnsw. CARMAN, or CHICAGO, ILLINOIS.

1T0 Drawing.

' To all whom it may concern:

Methods of Making the Same, of which the following is a specification.

r This invention relates to phooograp .c prints and the method of making the same, and is fully described 111 the following specification.

. March 21, 1925.

The process consists in taking a plate of silver, flattening it, eliminating all scratches or depressions by rubbing with fine emery cloth, after which the face of the sheet is given a series of parallel scratches, preferably in a vertical direction, by rubbing it with emery cloth. The sheet is then cleaned in a solution of caustic soda after which it is washed and ready to receive the print. In the case of silver, oxidation takes place so readily that the print should be applied thereon as soon as possible after the prepared plate is cleaned and washed.

While there are various ways in which the print may be applied to the prepared silver surface, I prefer to make this print upon a photographic transfer paper which consists of paper having a coating of gelatin or the like carrying a light-sensitive pigment. An

f exposure is then made on this sensitized paper, preferably by contact with a continuous tone negative in a well known man- "then removed from the water and squeegeed into contact with the metal plate. It is then dried from 10 to 20 minutes to cause it to adhere more firmly to the metal surface, after which it is soaked in hot water at a PHOTOGRAPHIC PRINT AND METHOD OF MAKING THE SAME.

Application filed October 26, 1925. Serial No. 65,045.

temperature of to F. and until the paper willreadily peel off leaving the sensi tized gelatin on the surface of the metal I plate. lhe'picture is then developed by wasl'iing out a portion of the gelatin which has not been acted upon by the light, there by leaving upon the surface of the metal plate the picture in varying degrees of relief. The picture is then fixed in a solution of alum, washed and dried in a well known manner, after which it is treated with a coat of transparent metal lacquer to preserve it.

By scratching this surface as I have done,

a series of bright parallel lines or scratches are produced in the surface of the metal which readily catch and reflect light so that the sharpness of the high lights is greatly magnified in contrast to the darker portions of the picture through which relatively little of this reflected light can pass. The result is that this method greatly increases the brilliance and pleasing appearance of any photographic print made in this way.

It will be understood that while a transfer process is here described, it is illustrative only, and that other transfer processes may readily be used or, if desired, a sensitized gelatin coating may be placed directly upon the surface of the metal plate prepared as has heretofore been described, and the exposure and developing may be made in any of the well known ways directly upon this coated plate, after which it may be developed, washed and fixed in any well known manner.

Metals other than silver may be used for this-purpose. For example, the prepared surface of the plate may be gold plated and polished, and the picture then deposited as has been described upon this gold plated surface.

lVhile I have described but a few of the embodiments of my invention, it is to bi understood that it is capable of many modi fications. Changes therefore in the method and arrangement may be made without de parting from the spirit and scope of my invention as covered by the appended claims.

I claim:

1. The method of making photographic prints on metal consisting of forming-in the face of the metal a series of parallel scratches, and applying thereon a continuous tone photographic print.

2. The method of making photographic prints on metal consisting of forming in which are in strong contrast to the high 15 the face of the metal a series of parallel scratches, and applying thereon a continuous tone photographic print, the deep shadows of Which are in strong contrast to the highlights.

3. In a photographic print, a metal base having a series of parallel scratchesin its "face, and a continuous tone photographic print on said surface.

4. Ina ahoto 'ra hic rint a metal base l e P a having aseries of parallelscratches in its face, and. a continuous tone photographic print on said surface, the deep shadows of 1 lights.

5. In a photographic print, a metal base having a series. of parallel scratches in its face, and a continuous tone carbon print on said surface. I

6. In a photographic print, a silver base having a series of parallel scratches in its face, and a continuous tone photographic print on said surface.

Intestimony whereof I have hereunto set my hand this 15th day of October, 1925.

7 CHARLES IV. CARMAN.