US1787201A - Combined black and white and colored image photography - Google Patents

Description

Dec. 30, 1930. w v KELLEY 1,787,201

COMBINED BLACK AND WHITE AND COLORED IMAGE PHOTOGRAPHY Filed Nov. 4, 1925 Subject Fed Ne affve. Red Blind Ne cal-Ike.

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- 71%,. fi' From f second BY g 5 L YS ,br/hflhy 11.5fm F17 3 A I Patented Dec. 30, 1930 iiifumrao STATE-S WILLIAM v. n. KELLEY,

OFFICE or masmr 01m, NEW wasn't, fassrenoa To KELLEY coLoR rrLms, 11m, A conroaa'rron org rnwmasnv COMBINED BLACK AND WHITE AND coLoain) when rnoroommr Application filed November 4, 1925. Serial No. 68,698.

This invention relates to photography and particularly to color photography,

A principal object of this invention is the production on a carrier of a composite photoe graphic image. of a subject which when vention selected for the purpose of illustratingth'e principle of the invention, reference will be had to the accompanying schematic drawings and the characters -of reference thereon designating like parts .in the several views, and in which:

colored subject; Fig. 2 is a red filter or red color selection negative of'Fig. 1; Flg. 3 1s a redblind negative of Fig. '1, that is, the

ordinary black and white negative Fig. 4 is a positive made from Fig. 2; Fig. 5 is a print representing red color valuesonly; Fig. 6 is Fig. 5 colored by my'process'; Fig. 7 is the fimshed print.

For the purpose of explaining the printhereof I have selected a subject which I have illustrated by Fig. 1 of the drawings. This subject is to be considered as being colored in the areas shown, as red, white and black and as indicated on the drawing.

In carrying out my invention also an ordinary black and white Fig. 1, and

The red color selection negat ve negative.

white negative by Fig. 3.

From my red color selection negative Fig. 2 I then make a printing positive Fig. 4.

. Using Fig. 3 and Fig. 4, as negatives, I make a print Fig. 5. This print I develop Figure 1 is a schematic illustration of aciple of my invention and the application I ma sa e a red color selection negative of the subject].

is illustrated by Fig. 2 and the black and,

in an acid diamidophenol bath a. about 3 mlnutes and wash. 1

In order to color the printFig. 5, I tone in a bath as follows:

Ammonium metavanadate 1 gram Oxalic acid 2 grams Water 200 ccs.

The above are boiled for fifteen minutes. Then there are added:

Oxalic acid 15 grams Potassium ferricyanide 15 grams Water to make' 1 liter I find that about fifteen minutes treatment I by this bath is sufficient.

After treatment by the above stated bath I wash andthen clear in ,a bath as follows:

Potassium metabisulphite 5 grams Ammonium bromide 5 grams Water 1 liter After treatment by this bath for about- 10 minutes I wash and dry.

The treatment by the clearing bath acts to convert any-of the products produced in the gelatine to such condition that they will not redevelop without exposure.

The .print is now in the condition shown by Figure '6.

. I next, using the negative Fig. 2, print using the print Fig. 6 as the receiver, and thereby form a black and White key image that is a minus red image comparable to ordinary black and white photography.

After printing I develop as usual in acid diamidophenol, wash, fix in sodium thio sulphate, and wash.

bath theprint became a lemon or yellow color iin those regions corresponding to the red- .regions of the original subject. -I must next change this yellow to a red. ,7 I do this by treatment'for above fifteen minutes in: the following bath:

1Fuchsinecrystals, 2.5 grams *Chrysoi'dineY'j; 10.0 grams Glacial acetieacid- 10.0 ccs. Water; f ;l; L 4.0 liters After treatment thlSfbath the print is After thetreatment with thevanadium salt washed and is then finished by drying giving a product illustrated by Fig. 7

Of course instead of a record of the reds I such other color as is desired to show in the finished print is not excluded by the specific illustration and description of red.

AlthoughI have particularly described the construction of one physical embodiment of my invention and explained the operation and principle'thereof and of my process used for the production thereof, nevertheless I desireto have it understood that the form selected is merely illustrative, but does'not exhaust the possible physical embodiments of the idea of means underlying my invention or the extent of the applicability of my process.

What I claim and desire to secure by Letters Patent of the United States is:

1. A transparent carrier coated on one side only with gelatine having a reduced silver image of the minus reds in the original subof the pact and a toned color-representation red in the original subject.

2. The method of producing a photograph having a reduced silver image ofthe minus reds in the original subject and a toned color representation of the red color in the original subject, which consists in producing a representation of the red color in the emulsion of a carrier developing and toning this representation and then after clearing printing into the same emulsion using a red color selection negative of the subject as the negative. 3. A transparent carrier coated on one side only with gelatine having a reduced silver image of the blacks and whites andall colors in an original subject except one and a toned color representation of that one color therein. WILLIAM V. D. KELLEY.

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