SU35563A1 - The method of applying color grids photomechanically on any substrate - Google Patents

Description

 Recently, colored grids have become very common. They are used both for direct reading with the naked eye and in complex optical instruments. For the first use, they are most often made on a me- tall using engraving, followed by etching and painting or

fill | {1Lay; for the second case - pigment gelatin layers are often used, but sometimes in imported optical devices there are also usually negative grids painted with some kind of paint. However, the techniques and recipes for making such meshes are not written anywhere in the literature. One can only guess that this or that grid was made by one or another photomechanical method, but attempts to use the known methods for these purposes, without special elaboration of them, did not lead to satisfactory results. The proposed method of making color grids is that on an optical workpiece or metal the detail of the device is applied with a chromized layer of gelatin or fish glue, onto which, after drying, the grid is copied from the collodion bliss (124) ... :::

and then washed with water until all parts of the layer that were not illuminated were copied. As a result, a relief image is obtained on the workpiece, consisting either of high lines and strokes or of those deepened to the surface of the substrate (in the case of copying under a positive grid). The relief thus obtained is dried, then subjected to special treatment and stained in a solution of the corresponding color of the dye.

To obtain a sharply sharp mesh outlines, the relief image, after being developed with water, is treated for 2 minutes with a 10% solution of potassium dichromate, rinsed with water and dried, then immersed in XO a 1% solution of aniline dye (black aniline, methyl violet, fuchsin, etc.), which is heated to 50 °, and allowed to cool. After cooling the solution, the plate is removed and rinsed under running water until the transparent areas of the image are completely cleaned from the rest of the layer (to the substrate) and the paint and dried. The relief is well-colored, and the substrate in areas not covered by the image remains clean of the layer and paint,

Some dyes, such as, for example, malachite-green, dark green, and others, in order to obtain a good relief color, require the following change in the coloring process: 1% solution of dye with itch (5: 1) with 10% solution of tannin and the mixture, after immersing the plates in it, heat to 50 ° and leave to cool. This is the case of the kleevbgo slo. In the case of a gelatin layer, another 10 cm of a solution of tannin is added to each 50 cm of this mixture of dye solution and tannin. The remaining operations are the same.

For the manufacture of multicolored grids, the copying is made from several negatives, and first one negative is copied, containing a system of lines to be colored one color, after which the resulting relief is painted in the corresponding color and poured with resin varnish. When the varnish dries, on it

a new chrome layer is poured on which the negative of the next color of the image is copied, painted and poured with another insoluble protective lacquer that does not affect the transparency of the previous lacquer, and so on. Transparent grids and two colors can be made on separate glasses, which are then glued together.

The subject matter of the invention.

The method of applying color meshes photomechanically to any substrates by copying collodion negative on chrome-plated glue or gelatin is then applied in water and followed by dyeing the resulting relief with aniline dye, characterized in that the gelatin relief is dyed with a 10% treatment before dyeing potassium dichromate solution.