DE649C - Method for producing an autograph I print of writings and drawings - Google Patents

Description

1877.

Grade 15.

EUGENIO DE ZUCCATO in LONDON. Method for the production of an autograph print of writings and drawings.

Patented in the German Empire by the io. July 1877. Longest duration: June 16, 1891.

The method to be described here for the representation of autographic printing can in contrast to the well-known overprinting process, in which a negative plate is initially used is to be produced, referred to as a direct impression. The characters serve in a similar way to stencils as a negative, without them, as with otherwise known use of stencils that produce imperfections in the print, which when the the latter are inevitable. The new method can also be used, if only in one If color is to be printed, hundreds of impressions are obtained without printing ink to reapply, and any number of colors can be used at the same time and with one and the same imprint are used.

In its details, the new procedure consists of the following:

On a paper provided with a waterproof cover on both sides is written or drawn with a chemical ink. The ink dissolves the waterproof Overlays consistently on the paper without, as it is called, leaking and without doing the slightest damage to the paper fiber. In a water bath - the writing side placed on top - can be removed by washing with blotting paper or a brush on the back the solution products are in whatever fine lettering and thus are the characters to be used directly for overprinting are produced.

The impressions can now be made in several ways, namely:

i. Provides colorants, which the consistency z. B. of liquid sebum, or

2 .. mediate colorants that are applied in powder form.

In the first case many hundreds of prints can be made by a careful worker can be removed from the die without renewing the colorant.

In the second case, the colored powder is removed by means of a leather squeegee after ten to twelve prints or a suitable brush applied again.

Both printing methods include a pressure pad that z. B. from ten to twelve layers of soft blotting paper with a cover of sheet rubber. On this pressure pad lies a sheet of fine velvet, which in the first case, with the colorant to be chosen, in the second case, however, with glycerine, which contains a small amount of gum arabic contains, is soaked.

To make the impressions, put the writing matrix paper, the writing side down, and after having done the same with the colorant in the first process has brushed onto the pressure pad with the velvet cover.

In the first method, the prints are then obtained by simply adding the colorant from the pressure pad side through the paper fiber of the stencil paper to any one Writing, printing or drawing paper is printed through in an ordinary copier press.

In the second method, which is to be used for color printing, the glycerine is prefilled Print pad through the fiber of the paper matrix on blotting paper and dabbed or brushed the different lines of writing or the figures of a drawing with those chosen for the imprint powdery paints.

The production of 1. the matrix paper, 2. the chemical ink, and 3rd the colorant for the first and second printing method happens like follows:

i. For the stencil paper one choose the strongly glued and satinized English bank bond paper, known for its extraordinary toughness, and cover it quite uniformly on the side which is to be used for writing with a solution of rubber gravel in alcohol, in the ratio of y ₄ kg of rubber grit approx. 2 _1/2 liter of spirit, to which an addition of approx. 3 g of Venetian turpentine is then mixed. - The back of the paper must also be provided with a waterproof covering agent, for which either a thin solution of resin in spirit with an addition of turpentine oil or, better, the varnish used by gilders (gilding

Claims (3)

basic) may choose to which one then 3 parts by volume alcohol and '/ ₁₆ mixed volume partly Venetian turpentine. After drying, the paper can be repeatedly coated with these covering agents. 2. The ink consists of a caustic preparation, i. i. a saturated solution of Soda or potassium hydrate in water to which indigo or another color is added, which does not diminish the caustic properties of the solution and is not itself destroyed. 3. a) The ink for the pressure pad is a solution of any suitable aniline ink in glycerin in the ratio of 2 to 3 ounces of the aniline to _1/2 kg of pure glycerin. b) With the color printing process, the pressure pad is only slightly soaked with pure glycerine and any aniline color, finely powdered, with a soft brush on the The side of the paper matrix facing the pressure is applied, but the excess with a removed with a clean brush, so that the paint only applies to those moistened by the glycerine of the pressure pad Lettering sticks. The inventor notes that he is not concerned with the execution of the method described limited exclusively to the substances and their mixing ratios as described in Above are given, but reserves the same, the same through others, the same Substances with an effect or to be replaced by other mixing ratios. Patent Claim: The Method of Duplication of writings and drawings, in which a porous paper matrix was first made and then a coloring substance is pressed through the parts made permeable is, essentially as described.