US1465643A - Sensitive plate, film, or the like for color prints - Google Patents

Description

w. V. D. KELLEY SENSITIVE PLATE}, FILM, OR THE LIKE FOR COLOR PRINTS Aug. 21, 192 3.

Filed March 23 1920 Patented Aug. 21, 1923.

WILLIAM V. D. KELLEY, F BROOKLYN, NEW YORK, ASSIGNOR TO PRIZMA,

- INCORPORATED, A CORPORATION OF MAINE.

SENSITIVE PLATE, FILM, OR THE LIKE FOR COLOR PRINTS.

Application filed March 23, 1920. Serial No. 368,056.

To all whom it may concern:

Be it known that I, WILLIAM V. D. KEL- LEY, citizen of the United States, and resident of Brooklyn, in the county of Kings 6 and State of New York, have invented certain new and useful Improvements in Sensitive Plates, Films, or the like for Color Prints, of which the following is a specification.

This invention relates to photographlc material and has particular reference to the production of photographic material as an article of manufacture ready for the usual printing with negatives by the user.

The object of the invention is to simplify the procedure necessary to be followed by producers of colored pictureson plates, film or paper, and more particularly transparencies reproducing the colors of natureon the additive light.

At thepresent time, so far as I am aware, manufacturers of colored pictures are compelled to perform in their own plants prac- 2 tically all the special operations necessary to produce the pictures, as the manufacturers of sensitized paper, plates and films, only make up special materials of this character for manu acturers of colored pictures upon order, which involves excessive expense to the purchaser, non-uniformity of material owing to the present relatively small consumption, and also delay in obtaining even ordinary material for color work owing to the special care required in the manufacture of plate, film or paper, for color work uniformity required in difierent lots, like printing speeds of different emulsions, etc. At the present time there are no light sensitive media in the market specially prepared for use in producing colored pictures, whereas if such partially prepared materials can be principle by transmitted obtained there will immediately be a verywide extension of color photography owing to simplification of the work to be done.

In my application 243,879, filed July 8, 1918, patented April 20, 1920, #1,337,77 5, is disclosed a process for producing colored pictures on the additive principle, and the resulting colored picture product, which is peculiarly suitable for use by workers of orinary skill, provided the precision work necessary in preparing the plate or film to receive the color value images is'already performed. As will be seen upon reference to said application and patent, the plate or film is first photographically printed with a finely subdivided pattern or design, leaving in the interstices of the emulsion residual sensitive portions which receive the impressions from the color value negative.- A double coated plate or film is specifically shown having the design on one side in registry with the sensitive portion on the other, the finished plate or film being produced by 06 coloring both the image and design on one s1de in one color and the image and design on the other side in another color, and additlvely producing complete color when the design is sufiiciently fine. Exceedin ly accurate work is required in making t e de- Slgn printlng screens, and also in printing the design on the sensitized plate or film, and in accurately corelating the second design on the other side, and in the case of relatively narrow motion picture films for example, an unnecessary expense is involved in printing the strip, immediately before the negatives are printed.

It is the object of this invention to provide as an article of manufacture, design printed undeveloped sensitized plate or film to be made by the manufacturer in large quantities, and sold to the trade ready for printing from negatives. Thereby, the manufacturer 8 of colored pictures is relieved of the necessity of having the necessary screens and doing his own design printing, but can obtain the desired design in rinted stock, either single coated or doub e coated, from the to manufacturer at low cost and with the assurance of greater uniformity.

This application is in part a continuation of (siaid application 243,879 and patent aforesai In the accompanying drawings:

Figure 1 shows a single coated photo-s graphic plate or film embodying the invention,

to ether with the designs displaced, and

igure 3 shows a double coated plate or film such as illustrated in Figure 1 of the aforesaid patent, embodying the invention.

Referring to Figure 1, 1 represents the base, either of transparent, translucent or opaque paper, glass, celluloid or the like, carrying an ordinary sensitive emulsion 2. This material is ordinarily made up in large sheets by the manufacturer, and in the case 110 Figure 2 shows two transparencies placed of plates and papers, is cut to stock size and packed forthe trade. In the case of films, the large sheets are slit along the dotted lines shown in dark rooms into strips then perforated along the edges in the dark and packed for shipment. Heretofore it has been necessary for the user of these materials to provide his own screens, precision printing mechanism, etc., in sufiicient quantity to produce the desired output of prepared sensitized positive film.

According to this invention the manufacturer of the film, plate or paper will print the pattern design thereon before he ships, and most economically will do this in machines which handle the original large sheets or webs. In printing single coated sensitized positive plates, film or paper the screens may be in the form of opaque or black lines on the surface ofsolidglass cylinders with the light, inside, so as to print continuously, it being seen that the light will pass between the lines andproduce a latent image in the emulsion. The material can then be cut up and handled and shipped in the ordinary manner of handling unexposed sensitized photographic materials.

In Figure 2 are shown two glass plates put together face to face with designs displaced, and secured together, to receive images of complementary color families in the unexposed portions 3, 4 being the printed undeveloped design.

In Figure 3 the base 1 is transparent and carries on each side an emulsion 2 printed with lines 4 relatively displaced and having residual sensitive relatively displaced portions 3.

The designs may be of any desired symmetrical pattern such as parallel lines, or checker board, etc., but generally the total area of the printed portions will preferably slightly exceed the total area of the unprinted portions. In the case of double coated plate or film as in Figure 3 for example, the printed lines 4 on one side will be very slightly wider than the underlying imprinted lines 3 by an amount to be determined by experience, and to some extent by the particular chemical process used for applying and fixing the color. The reason for this is that a preferred method of coloring is to bleach and mordant the lines,

and I have found by experience that some of these bleaches and mordants, as well as the other treatments necessary in supplying the color, tend to cause the gelatin carrying the bleached portions to appreciably shrink, so that if there is not a slight overlap of the printed portions of the design on each side there might be a separation owing to this shrinkage of the gelatin. If there is too much overlap objectionable lines of black will be produced.

The particular manner of photographi menses cally printing the designs on the sensitized material is not material to the invention, as various methods are possible, such as using flat screens instead of rollers ofi'set printing methods using opaque removable inks or resists, etc. Care must be exercised in printing double coated plate or film to'obtain the necessary registration of the designs so as to maintain the proper displacement, but this will not furnish any particular difficulty to the manufacturer, inasmuch as there is no shrinkage of the photographic stock to be taken care of. Where a plurality of displaced designs is embodied in one base, as in Figure 3, for example both de signs should preferably be printed at once as by rollers or flat screens held in proper registry by suitable pins. If the designs are once printed subsequent shrinkage due to treatment becomes immaterial because alike on both sides. Where two single coated transparencies are put together by hand, as in Figure 2, very satisfactory registration can be effected by eye; assuming that the designs are alike andv of equal or nearly equal total area in printed and unprinted portions.

In the production of colored motion picture films on the additive princi le, this in- *WBDtlOIl will furnish a decided a vantage by enabling the possessor of color selection negatives to make his ositive prints and then to complete the colbring by suitable processes desired.

I have found that for color motion picture work a design composed of 800 parallel lines to the inch is sufliciently fine to blend in transmitted light giving extremely beautiful colors. good perspective and pure whites, but I expressly do not restrict myself to any specific fineness or design.

Where I speak of making the displaced impressions in different strata of emulsion,

I intend to include both the species of Figure 3 having the strata on opposite-side's of the base, and also a form such as in F i ure 1 wherein one design can be printed rom the front, and the other in the inner stratum of emulsion through a transparent suport. i

In both of these forms it will be observed that development and fixing of the latent design images alone will simply produce a single discontinuous black image on the entire support, and that in the finished positive printed from color value images, the latter together constitute but a single discontinuous image. 1 Ultimately in order to view this image, the black design image will be rendered transparent, and toned, but additive color transparenci can be produced from the product of this invention without coloring the images, by a process other than that specifically disclosed in said application #243879.

menses I also intend to cover in the claims an op positely coated support such as in Figure 3, havin the desi n in one emulsion, and the other deft comp ete for such further use in making a color transparency as may be desired by the user, as at the present time, there are numerous known Ways of producing additive color transparencies other than that specifically shown and claimed in the patent aforesaid. For registration of a plurality of negative images on opposite sides, or the same side, of the same positive area, the registration method shown in my Patent #l,259,411, March 12, 1918, will be satisfactory.

.What I claim is:

1. As a article of manufacture, a support carrying sensitive photographic emulsion and having impressed therein a latent image comprising a subdivided additive screen design provlding residual sensitive portions.

2. As an article of manufacture, a transparent support carrying sensitive photographic emulsion having impressed in one stratum thereof a latent ima comprising a subdivided additive screen esign providing residual sensitve portions, and in another stratum a like latent screen image providing like residual sensitive portions, the respective designs and sensitive portions being relatively displaced so that latent image portions in One stratum overlie residual sensitive portions in the other.

3. As an article of manufacture, a trans parent support carrying a sensitive photographic emulsion on each side, at least one of said emulsions having impressed therein 'a latent image comprising a subdivided additive screen design providing residual sensitive portions to subsequently receive an image.

4. As an article of manufacture, a transparent support carrying a sensitive photographic emulsion on each side having impressed in each of said emulsions a latent image comprising a subdivided additive screen design providing residual sensitive portions, the respective designs and sensitive portions being relatively displaced so that atent ima e portions in one emulsion overlie residua sensitive portions in the other.

5. As an article of manufacture, a support carrying sensitive photographic emulsion having impressed therein a latent image comprising a subdivided additive screen design providing residual sensitive portions, the total area of latent image portions exceeding that of the sensitive ortions.

S an article of menu acture, a transparent support carrying a sensitivephotographic emulsion on each side having impressedin each of said emulsions a latent image comprising a subdivided additive screen design providing residual sensitive portions, therespective designs and sensitive portions being relatively displaced and of such diderent areas that latent image portions in one emulsion overlie and overlap the residual sensitive portions in the other emulsion.

7. As an article of manufacture, a transparent support carrying sensitive emulsion velopment the whole produces a single disand; a single discontinuous design image continuous image from two negatives.

Signed at New Yorkin the county of New York and State of New York, this 19th day of March, 1920.

ILLI 2 V. D. KELLEY.

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