US1573006A - Polychromatic security print - Google Patents

Description

Patented Feb. 16, 1926.

UNITED STATES EOSI LAMPL, 0F BERLIN, GERMANY.

POLYCI-IRGMATIC SEC'UBITY ?BI1 I'1.

No Brewing.

Application filed April 27, 1921.

Serial No. 465,032.

(GRANTED UNDER THE PRGVHSIGNS 01* THE ACT *3}? IVIARCH 3, 1921, 41 STAT. L, 1313.)

To all whom it may concern.-

Be it known that I, Rosr LAMPL, nee liltinnnn, residing at 2 1 llleinekestrasse, in the city 0% Berlin, Germany, have invented certain new and useful Improvements in Polychromatic Security Prints (for which I have filed applications in Germany, July 1919, Patent No. 362,878; in England, January 10, 1921, Patent No. 151,811; in Spain, March 29, 1921, Patent No. 77,632; in Sweden, March 21, 1921, Serial iluu'iber 1096/26; in Austria, March 11, 1921, Serial Number A. 1359-21; in Hungary, March 21, 1921, Serial Number L. 1-811; in Italy, March 17, 1921, vPatent No. 196,151; in Switzerland, February 28, 1921, Patent No. 95,082; in Poland, March 30, 1921, Serial l'lumber St ll/333T; in France, l'larch 31, 1921, Patent No. 533,638; in Belgium, March 29, 1921, Patent No. 295,009; and in Czechoslovakia, March 17, 1921, Serial Number I 11728/21), of which the following is a specification.

My invention refers to polychrornatic security prints and the like containing dilfen ent designs each in a color distinctive to the eye and of such character as will make it difiicult or impossible to reproduce the securities by any photographic pr cess.

In the specification to U. S. A. Patent 776,515 it has been proposed to prev. photomechanical reproduction of safety composite-color prints by employing for different and adjoining designs distinctive colors, the spectrum of absorption of one color comprising that of the other, the oriect being, that the two different designs will never appear separately on any photographic negative, thus making it impossible to obtain a separate negative for each different design. However in this case the two dilferent designs appear in different degrees of blackening on the negatives and their line of division of the adjoining parts is therefore distinctly visible, thus enabling the falsifier to correct those negatives by hand and to obtain a negative with only one design.

This disadvantage is however avoided when printing the two different and adjoining designs with such colors, which although being well differentiated to the eye always produce about the same degree of blackenmg on the negative when photographing the print with or without any color filtering means. No line of division of the adjoining parts to be seen on the negative and there fore no correctionscan be made by hand. It will easily be understood that the chilicu t es of falsifying securities are much greater, when their designs are printed with colors, producing about equal degrees of blackening on the photographic negative that is with colors having about equal (lo-- grecs of photographic luminosity.

My invention is applicable to a great va riety of dilferent colors and color combina tions from. different sources and manufacturers. Merely as instances of carrying the invention into practice I may mention the following examples of procedure in applying the dil'lerent colors or hues.

N o. 1. As a ground color I may use an aniline green, known in the market as No. 3.269 (510) green of the color catalogue of Kast & Thinger of Stuttgart, Germany; and in combination therewith for use as a design color, aniline blue, known as steel blue 0 (196) of the same color-catalogue. 2. For use as a ground color, an aniline red No. 4876 (5-11) known as bronze red in the said color catalogue; and as complement as a design color, an aniline brown, known as solid brown lake, middle, (No. 515) in the color catalogue of I). T. Gleitinann, Dresden, Germany. Further, for use as a ground coior an aniline green known as post green (No. 602) in Gleitmann s color catalog and complementary thereto the color, an aniline violet known as violet lake, dark (No. 308), in the said Gleitmanns color-catalogue. Further, for use as the ground color, an aniline violet, known as brilliant violet l luish II, No. 292 in fi'lcitmanns color catalogue, and coinplen'ientary for use as the design color, aniline brown, known as photographic brown II in Gleitmannswolor catalogue. 5. Similarly, for discharge printing I may use as the ground chi or, a composite color consisting of guinea-green and 85% mandarine-yellow; this a pure and rich dark green. Complementary thereto, for use as a design color (which is employed as the discharge or etching liquor) a composite color consisting of 98 mandarine yellow and 2% guineagreen, which presents in appearance a pure rich yellow or orange hue, but when printed on the ground color referred to, this discharge changes to a very dark olive green. The components of this last me ample are aniline colors made and sold by the firm i kctiengesellschaft fiir Anilinfarbenfabrication of Berlin, SO. 86, Germany.

I wish it to be understood, however, that I am by no means restricted to these different colors and color combinations; nor do I wish to be understood to say that the firms referred to are the only dealers and manufacturers from whom suitable inks or colors may be obtained, inasmuch as obviously any other dealer or manufacturer may be in position to supply suitable pigments. It will, however, obviously be necessary to ascertain by preliminary tests in each case, which colors, dyes or pigments, while possessing the desired.distinctness to enable the design to be easily perceived by the human eye, possess also the necessary similarity of photographic luminosity.

In carrying this invention into practice, any of the dillerent ways 'of' coloured printing or polychromatic printing may be used.

For instance a. multicoloured design may be provided on a neutral paper, cloth, or other base, whereby at least on a portion of the object to be printed, the different lines or points, which are printed in two or more colours, should be as close as possible to each other, so as to render impossible a subse quent colouring retouch of any photographic copy. It is further possible to produce the desired multicoloured effect by using a tinted or toned paper or by printing first a priming of one colour on the paper or the like, whereafter the given design in another colour or in several more colours is printed on the first priming ground or on the tinted paper. The colours of the first tinting or priming process and those of the subsequent design-makingcolors a-re selected as stated above, so as to possess the same photographic luminosity, although they look quite different to the eye of the contemplating person. The same result can be obtained also, if a tinted paper, or a paper which has been printed first by a priming plate, is printed thereupon with an etching-design, as it is usual in cloth-printing and in calico-printing. In carrying through this process the etching liquor or the discharges are pre pared in such a manner that resists or colors are added to the liquor which are not acted upon by the etching medium, and mordants or other color fixing agents may also be added, so as to produce multicolored designs upon the background. The colors or various hues, produced by the etch-printing, must be chosen in accordance with the colours of the priming or basic material, in so far as they must have the same or nearly the same photographic luminosity, as it had been explained above. Again the same result can be obtained by printing several colours of different photographic luminosity one on the other, if only care is taken, that the mixture or combination of the component colours results in such definitive colour-tints, which have exactly or nearly the same photographic luminosity. Another possible application of the invention would consist therein that a negative and a positive print of the same design in the above stated colours are printed one on the other in such an exact manner, that thereby the printed pictureis produced.

The before described printing method can be combined with the ordinary method in use until now, as on account of the fact; that a portion of the picture, being prepared according to the invention, can not be photographed, the entire print cannot be counterfeited.

I claim:

l. A polychromatic security print and the like comprising adjoining designs, each in a distinctive color, said colors producing about the same degree of blackening of the negative, when photographing the print without and with any color filtering means.

A polychromatic security print and the like comprising partially overlapping designs, each in a distinctive color, said colors producing about the same degree of blackening of the negative, when photographing the print without and with. any color filtering n'ieans.

3. A polychromatic security print and the like comprising a colored undergrouml and a design superimposed thereon in a distinctive color, the underground and the design producing about the same degree of blackening of the negative, when photographing the print without and with any color filtering means.

In testimony whereof I affix my signature.

ROSI LAMPL.