US1446050A - Producing multicolored screens for photography - Google Patents

Description

Feb. 20, 1923.

l. KITSEE PRODUCING MULTICOLORED SCREENS FOR PHOTOGRAPHY Filed` Jan. 17, 1919 mnmnnnmnnn mDmmumnDmnD-u u l1 @l Patented Feb. 20, 1923. y

ISIDOR KITSEE, 0F PHILADELPHIA, PENNSYLVANIA.

vJPRODUCIINGr MULTCOLORED SCREENS FOR PHOTOGRAPHY.

Application led January 17, i919. Serial No. 271,709.

To all whom it may concern.'

Be it known that, I, IsIDoR Kirsnn, a citizen of the United States, residing at Philadelphia, inthe county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Producing Multicolored Screens for Photography, 'of which the following is a specification.

My invention. relates to an improvement in multi-colored screens.

rlhe object of my invention is to produce a multi-colored screen directly on the celluloid out oi which the photographic blank- Amoving picture film for example-is produced. l

lt is well understood that so 'tar nearly all lattempts to produce multi-colored screens for photographic blanks and more specially for moving picture -lilins require-d as the iirst step the surfacing of the Celluloid with a gelatine llm, so that the different colors may be applied to the gelatine, as the application of the usual color solutions to the Celluloid met with great diiiiculties.

l have discovered, that it is possible to produce color solutions, ailecting the celluloid in di'erent degrees and yet repelling each other when applied to the Celluloid, in other words l have discovered it is possible to apply: first, ligurations ci one color to the Celluloid proper and 'then wash the whole surface of the celluloid indiscriminately with a solution of a second color without interference between two colors.

My invention may be practiced with a two-color three-color or four-color screen but l will'here describe my invention as applied to a'twoas well as a four-color screen; it being understood that the colors selected as examples, may be replaced by other colors, but the medium or solution carrying the colors should be strictly adhered to.

ln the accompanying drawing F l to 3 inclusive are plan views representing the different steps in a two-color screen Figs l to 6 inclusive are plan views representing the diiierent steps in a four-color screen.

l will now describe the :mode or method of procedure in obtaining the required result, and in doing so I will refer to the different numbers as indicating the different parts of these figures, and l will here describe this I'ny invention as bewingapplied to moving picture films. But l will point out first the method and means of producing at least two different color solutions, each of them desirably ail'ecting the Celluloid proper, but yet, not in'juriously ad'ecting eachl other.

have discovered, that alcohol is dissolved in an alcoholic solution containing a dissolved, but suitable rosin or resin, the so colored solution, when applied to the surface of Celluloid adheres to the same strongly does not spread or run and gives in fact a clear figuration if applied with the aid of a roller or other printing device,`or if applied with the aid of a brush and the inter-position of a suitable pattern. Great care has to be taken in the selection of such resin on account of the great number of requirements requisite for this purpose, such for instance `as pliability even when drytrans parency, solubility and the like, and l have found after a series of experiments that hardly any other resin answers all purposes beside the resin known as balsarn, but of this I' genre only such balsams should be used, as

give a very clear and uncoloredsolution with alcohol, the Peru or the Canada balsain is well adapted for this, purpose.'\-ln my experiments ll' have in some instances,

lirst dissolved the color in the alcohol and thenv added the balsain allowing to stand till the balsam'was entirely dissolved. ln some instances ll dissolved first the balsam then added the color. n p

The method and means of producing the second solution is simply to dissolve the color in a liquid adapted to dissolve celluloid, in other words in a solvent of Celluloid andy ll have found that acetone is well adapted for my purpose; To this colored acetone l add a `inrfzdterial not only capable ot restraining action of the dissolving prop-- erty oit the acetone, but also .as-an added enough for all purposes, and- ,dgt

.60 if a dye soluble in i repelling medium towards the liistcolor when about dry. As such medium, ll have found that formaldehyde is well suited.

'lo produce therei-ore this second solution, l

dissolve the proper color in acetone and 'add then yformaldehyde in diluted state. liquids give clear imprints on the Celluloid, but whereas the second solution impregnates the celluloid toa greater or less extent, the first only colors and adheres to the Both ics

surface of the Celluloid, and l call the first solution the fB-solution and the second the tl-solution.V lWherever therefore 'in this application or claims following this apof celluloid.

containing the dissolved resin plication ll refer to the 1S-solution, l understand under this expression, the solution and whereever ll' refer to the C-solution l understand the solution containing the solvent lln Fig. 1, l indicates part of a moving picture film, la the perforations with which the films are usually provided. lin Fig. 2, the figurations of one color here green, are indicated by the numeral 2. rll `hese figurations are here represented by dots, but their diameter is greatly exaggerated so as to clearly bring out their coloration. 'These dots maybe applied to the ilm with the aid of suitable printing devices or may simply be sprayed on with the aid of sprayers or so called nebulizers. For these figurations ll use the iB-solution, and after drying the figurations, ll cover the free spaces between these figurations with the second color, here red, as is clearly indicated by the numeral 3 in Fig. 3. ln reality these spaces occupy a far smaller area, but it is necessary for me to exaggerate these spacesso as toclearly illustrate the coloration of same. This second coloration is produced with the aid of the C-solution and can be applied to the film, by simply going over the surface of the film with the aid of a sponge or other suitable contrivance dipped in this solution, for the reason that this solution will not injuriously aifect the first igurations. The film is then washed so as to remove the surplus dye. When completed, the film will represent here the two colors green and red in required sequence.

l will now describe the production of the screen as illustrated in Figs. 4 to 6.

lln Fig. d, the part of the ilm is indicated by l, its perforations by la, and the longitudinal lines here representing the color red, by the numeral 4. rll`hese lines are produced withthe aid of the B-solution and may be applied to the ilni with the aid of rollers or other suitable printing devices.

n Fig. 5, which illustrates the addition of lateral'lines, 5 indicates these lateral lines, here blue. rlfhese lines produced with the iB-solution may also be applied with the aid of rollers or other suitable printingv devices. Fig. 5, clearly illustrates these lines and the spaces between these lines. llt has to be stated, that the lateral lines as well as the longitudinal lines are spaced onel from the other in a manner so that the spaces between each of the lateral lines as well as the spaces between each of the longitudinal lines occupy an area about equal to the width of the lines themselves. All these lines together will therefore represent a netfwork of lines, comprising here the two colors red and blue. But as the blue lateral vlines cross the red longitudinal lines, the junction, comprising the two colors red and blue will represent the additional color, blue-violet, if the blue predominates or redviolet if the red predominates, and this additio-nal color is here indicated by the numeral 6.

l After drying, the whole ilm is gone over, with the aid of a sponge or other suitable device, provided with the necessary color, here green, whereby the free spaces between the lines are impregnated with the green color. rllhis color is produced with the C- solution"7 and will therefore not interfere with the coloration of the longitudinal or lateral lines. ln lFig. 6, which represents the finished screen the coloration of the, formerly free or blank spaces between the lines are indicated by the numeral 7.

llt is obvious, that the colors enumerated may be supplanted by other required colors.

llt is also obvious, that the surplus color of the tl-solution?7 should be washed away.

Having Vnow described my invention, what ll claim as new and desire to secure by Letters Patent is yllhe method of producing a multi-colored screen integral with a Celluloid moving picture film which consists in applying to said film directly at least two tions, the first of said solutions having a dissolving action on the Celluloid of said film and the second of said solutions adhering only'to the surface of said Celluloid.

lln testimony whereof ll in the presence of two witnesses.

' lSlDOR Kll'lSElE.

Witnesses: l

y E. E. MILLER,

JOHN J. lttu'rrrnnronn.

different dye-soluatiilx my signature I

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