DE14775C - Lithographic reproduction process without mirror writing and without the use of a printing press - Google Patents

Description

IMPERIAL

PATENT OFFICE.

CLASS 15: Printing.

Printing press.

If you describe or designate a lithographic stone slab with chemical ink, just as one would do the writing or drawing on paper, and treat it Stone by etching with a dilute acid, preparation with gum arabic solution and rolling in with a lithographic printing ink, as is customary in lithography one (wrong) sharp imprint of the writing respectively. Drawing of this stone, though one on the same a several millimeter thick plate of letterpress roller mass, which on the back is connected to a non-stretchable sheet of canvas drawn on paper is, laid down without creases and lightly on the stone slab by stroking it with the flat of your hand presses.

The side of the elastic transfer printing plate provided with this imprint is then placed on it Paper, glass, porcelain, wood, fabric, or metal, so gives that of the stone slab recorded writing or drawing on these objects, as accurate and sharp (now correct) imprint of the original on the stone slab.

The color on the elastic transfer printing plate is enough to immediately add a second and, depending on the case according to the greater or lesser extensibility of the color (with Milori blue up to 12 to 15), to make even more impressions on the aforementioned objects.

Any traces of writing or drawing still present on the transfer plate can be removed very easily by wiping with something dampened with petroleum or turpentine Sponges without wearing down the elastic mass of the transfer plate in any way. After drying with a clean cloth, the plate is immediately ready for further impressions usable.

In ordinary lithography with the use of a press, the color layer is allowed should only be applied thinly to the stone slab, otherwise the writing etc. when passing through would be squeezed wide by the press.

The inventor's manner allows a much thicker layer of paint to be applied, which is made by the elastic transfer plate is not removed at once, so that several impressions are made one after the other from the stone slab to the elastic transfer printing plate, which each time several prints on paper etc. before you have to roll in the writing plate with ink again. Are from the flagstone Several impressions are taken one after the other on the transfer plate, the former are rolled again vigorously by means of the paint roller one and repeats the manipulations of the printing on the transfer plate and transferring from this to aforementioned objects, as before.

By avoiding the pre-pressure on the stone slab and by reducing the netting the same, which takes place for every impression in ordinary lithography, becomes the

Writing, etc., of the stone slab is so spared that the number of impressions possible from a stone is almost unlimited.

This process of printing on the elastic transfer plate and peeling off This on the mentioned items is with the same ease for all lithographic Writing and drawing manners, as well as applicable for photolithography.

Claims (1)

PATENT CLAIM: The lithographic reproduction process with direct and positive (not wrong) Stone writing resp. Drawing, without mechanical pressure, applicable to all manners of the Lithography and photolithography, for printing on paper, glass, porcelain, wood, Fabric or metal, by means of an elastic plate.