US1626522A - Color printing - Google Patents

Description

No Drawing.

Patented Apr. 26, 1927."

1,626,522- Pics.

savanna? :B. rnnrnnno, or cmcrnna'rr, 'omo.

COLOR rnmrme.

Application filed January My invention relates to printing in colors,

and particularl to offset work, in which the plate itself oes not directly contact wit the object being printed.

In printing 1n colors, the elfect gained is considered most perfect when the colors are clear, and to appearance laid on as paint, instead of being printed in ink.

However, it is bad to give the impression of a decalcomania or embossed effect, as this does not a pear natural. Offset printing is capable o producing the softest and most nearly hand colored effects, and hence the application of my invention to offset printing is, I consider, its most important phase, since it imparts a freshness and brilliance, which ofiset normally la'cks. Referrin very brlefly to oflset printing with etche plates, it will be noted that there are plates formed of theartists production,

which is first photographed, through color filters to produce a plate for each color of the production. These plates are used to print on the blankets, and the blankets print upon the cardboard, paper or whatever is being printed, in the colors for which-the plates were formed.

Bymy invention,- after the object is fully printed, an additional printingis made with .a suitable varnish or size, such as co al varnish, with sufiicient-lubrieant to ren er it less tacky, using a plate prepared for this purpose. Also the varnish imprint can be made at other stages, and additional colors printed over it.

Either a master plate is formed with de-f' sired parts of the original design etched therein, or a plate is used which is the same as one used for any one of the printed colors of the design.

For example in gift cards, I may employ a light color such as bufi or cream for the first plate, which prints those parts of the design that are a light color, and over which are printed subsequent blacks, blues, greens, light pinks, etc., to gain desired color efli'ects, each imprint for each color being brought into registry with the previous imprints.-

Finally after the sheet of cards is finished, I take the same plate that has printedone of the colors and use it with a copal varnish instead of an ink. The plate which printed the light blue is usually the most eflective,

but I use the plate for that color which will give the most brilliant'efiect for the typ of ofi'set I am producing.

a, 1326. Serial m. 30,359.

The result at use of my process, whether all-or only a part of the design is given a" superimposed coating of the varnish, is to brighten the colors, and give the object a hand touched efi'eet, which falls well short of any raised efi'ect, but gives a more pleasm 7 ing[ appearance to the eye.

he use of my recess in offset printing is particularly ya uable as the amount of color used and the kind of object printed lends itself well to hand work efiect, and the amount of the varnish applied will be enough to brighten the colors, heighten the clearance of the design, and yet will not be apparent as a oss unless the observer slants t e object to t e light to obtain a reflection.

the efiect of thickness without artificiality, which heightens the beauty of the design. More than one varnish imprint may be used,

. Furthermore, this gloss, such as it is, gives h with a master plate, or any or all of the original plates, and at any stage of the printing although at the close is preferred.

There is one other kind of printing in which my invention has excellent application and that is in lithography. In lithography I may provide an extra stone for printing the varnish or size impression, or

use any one of the stones over again for making the transparent imprint. The hand painted effect of the best type of lithography is considerably enhanced by my process.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is

- 1. A process of color printing, which consists in applying successive imprints in register for each acolor, among which imprints is one employmg a transparent varmsh or s1ze also 1n register.

2. A process of color printing, which con sists in applying colors by successive im' prints in register and then imprinting over the completed design a transparent varnish or size imprint also in register.

3. A process of color printing which consists in applyin successive imprints in register for eac color, among which imprints is one employing a transparent varnish or size also in register.

4. A process of color printing by ofiset,

whiehconsists in applying colors by succes- 've' imprints in reg1ster and then mprinting over the completed design a transparent varnish or size imprint also'in register.

5. A process of color printing by ofi'set, prints in register, and then imprinting over which consists in applying successive imthe completed design a transparent varnish prints in register 'for each color, among or size by use of a plate which is the same 10 which imprintsis one employing a transparplate or a replica ofeny one of the plates ent copa-l varnish also in register. used in the offset printing.

6. A process of offsetcolor printing which consists in applying colors by successive im 1 STANLEY B'. FREIBERG.