DE33330C - Printing process - Google Patents

Description

IMPERIAL

PATENT OFFICE.

CLASS IS: Printing.

JULES CHATENET in PARIS. Printing process.

At present printing is always done in such a way that the relief printing plates are also used Black or color and then printed on the surface to be printed,

The present printing process is almost the opposite of this process.

With the same, the wayside shrine or the relief printing plate is not blackened or with Color, but the color or the blackness becomes uniform on a surface spread out, the surface to be printed with its print side on that blackened or colored surface and then the wayside shrine or the relief printing plate on the top facing back of the surface to be printed.

The printing area then takes all of the colored area below it where the raised areas of the relief have pressed on the same, while the areas of the surface to be printed which correspond to the recessed areas of the relief remain without color.

This procedure, which is completely opposite to the previous one, has the advantage that it There are much more beautiful impressions with finer penumbra and sharper contours.

Another very important advantage of the new method consists in the fact that the Lightly grain the plate to be blackened and in this way prints of great fineness and beautiful penumbra, since it is naturally far more convenient to achieve a large, even one Surface to be grained like the raised parts of a wayside shrine.

In this way the wayside shrine is divided into two parts; are on one side the elevations and depressions of the wayside shrine and on top of the other is the grain that produces a smooth and accurate print.

This general principle of the invention is practiced in the following way: Man uses gelatine cliches as relief printing plates with elevations and depressions, similar to those which one uses in the phototype.

In order to obtain prints of the specified type with the aid of an ordinary hand press, attached a metal plate, both of which are completely smooth, on the pre-filling lid and run exactly parallel to each other. The gelatin cliché is then placed on this plate Glued on with wax or another suitable material, with the relief side facing up.

Then a metal block is placed on the foundation of the press, its surface any of the known ways has been grained, and blackens the same one or gives it color.

The print sheet is then, as usual, on the presetting cover and as a result of it Put directly on the gelatin cliche, put on the frame and the whole thing on the blackened one respectively colored block. aufeprefst, whereupon you get the desired imprint receives.

As a result of its great flexibility, a gelatin cliché can also be wrapped very easily Place the cylinder of a high-speed press, on which the granulated and blackened block

takes the place of the usual printing form.

It is clear that any other suitable substance can be used in place of gelatin Can apply production of the cliché or the relief printing plate. You can see the relief in gouache fashion or with Arabic gum or thick glue on a metal plate or Apply or print a thick carton.

In order to save color, it can only be applied to the ones corresponding to the relief of the cliché Place the granular block on a template, in which case, of course, one must be precise report, must.

You can also print with several colors by adding a corresponding number of cliches used.

The prints obtained by the present process can be distinguished very well from those obtained in the usual way both by their fineness and by the impressions on the paper, which are just opposite to those of the usual prints. ■ - _t .

Claims (1)

Patent claim: A printing process which consists in printing on the back of the with his. Print side of a print sheet placed on a uniformly grained or smooth blackened plate the not blackened look, or the relief printing plate prints, whereupon its printing surface in the raised places of the cliche's depressed parts of the blackened plate underneath Color takes on.