DE373621C - Color grids and processes for their production - Google Patents

Description

Color grids and processes for their production. L u .m i e r e s Autochromraster consists of granules swollen in cold water and flattened by pressure of strength, which can still be recognized as such and alongside that of the sole pouring of the unavoidable gaps necessary filling compound which causes low transparency. This one The present invention avoids a major disadvantage in that the grid elements do not consist of starch itself, but of transformation products and derivatives thereof. By appropriate treatment, one can obtain many derivatives and derivatives: starch preserved, which still show the original structure in whole or in part. This One can treat either the starch granules themselves before or after coloring subjugate, or you first create a polychrome starch grid and subdue that of a suitable chemical treatment.

The easiest way is to B. ammoniacal starch granules or neutral vat with indigo: itden or anthraquinone vat dyes, or with indigo white, or bisulfite addition products, as it were: indigoi: of the dyes, or with para-red, with azophor: dyes, tannin or metal dye lacquers, etc., waterfast green, to color blue and red: .the mixture, whose granules are run through a rubber solution, ' Glycerine etc. applied to the sticky pad and poured for a few minutes Exposed to steam until the starch granules completely gelatinized and clumped together have flowed. In order to achieve this completely, the granules can possibly be used : the steam treatment should be impregnated with a 5% solution of zinc chloride. Finally, if necessary, a Pair of rollers, are pulled to achieve total cohesion.

Or you can convert it into dextrin or by roasting it into a product um, which consists of dextrin on the surface and some starch inside the grain. For example, the blue-green colored portion of the starch granules is diluted with iproz, entiger Hydrochloric acid moistened, fairly dried and now in a closed vessel heated to 100 to 12o ° with frequent shaking. The mixture of all three powders is then applied to a sticky pad and steamed or stored slowly brought to flow together in a damp place. The coloring: des Dextrin itself is possibly made in an aqueous-alcoholic solution of the dyes, in which it is insoluble; the last remnants of water are removed in a high vacuum. To a It is here and also at to safely avoid flowing over each other at the edges the Pasting in a thin rubber solution prior to steam treatment, Kollodi.um, a diluted viscous 01'o. like. to: bathe, so that every grain is surrounded by an insulating intermediate layer, which al: he flow together does not prevent it, as it squeezes out completely or for the most part during the steam treatment will.

Decomposition products of starch also arise - their constitution is to Part still unknown - if one compares the colored granules with the most diverse chemical Agents, e.g. B. zinc chloride, 11 agnesiutnchlori: d, caustic soda, etc. impregnated and on a plate and now on its own or in the presence of Was: serdarnpf heated for a long time, preferably in a closed vessel, with O.uellung and Merger takes place.

Instead of starch, lycopodium and other pollen grains can be used in all cases to be used. Mixing works better because of the slipperiness of the lycopodium.

As a derivative of starch, which changes without any significant change in shape known methods can be used: formalin starch, starch carbonate, Starch superoxvd, acetyl starch, benzoyl starch, nitro starch, feculosis, ether of starch (e.g. by methylating with dimethyl sulfate in the presence of alkali). About the shape To keep the granules as unchanged as possible, treatment with acetic anhydride, Acetyl chloride, BenzoyIchlorid, dimethyl sulfate, etc. expediently in the presence of a Nonsolvent for the end product, e.g. B. benzene, pyridine, made, as well as this is already known for cellulose.

The staining of these products will be mild by pre-soaking them in heated alcohol to open pores, much easier. One brings z. B. the swollen nitro starch in an aqueous fuchsine solution, treated finally with silicatungstic acid solution to create the insoluble colored lake. The applied Mixture: the granules are first coated with diluted rubber solution, and then the granules are made to flow together by vapors of alcohol, acetone or the like brought.

To produce a grid, one can also proceed in such a way that you first apply a mixture of two differently colored granules and the Interstices with colored smaller starch granules or extremely fine powder of a colloid fills. That in i a different solvent than i already existing larger granules is swellable. E.g. one wears larger, waterfast red at first and green colored starch granules and fills the spaces with finely powdered Resin, the blue with a dye which is only soluble in benzene and not in water is colored. This resin is first made to flow together with benzene vapors, and by treatment with steam, the starch granules are gelatinized and thus transparent. Or one carries a mixture of red and green colored granules with relatively few blue granules of acetyl starch and fills the spaces in between with very fine powder of blue colored gelatin or dextrin or arabic Rubber; the latter is caused to close the gaps and by water vapor If necessary, by subsequent treatment with acetone steam, the acety,] starch grains can also be made to flatten or make it almost completely transparent.

Claims (1)

PATENT CLAIMS: i. Color raster for Dreifarl.enphotographie, thereby characterized in that the grid elements are derived from derivatives or other conversion products the strength of the lycopodium or other pollen grains. a. Procedure for Production of the grid according to claim i, characterized in that: a polychrome starch granule grid by subsequent treatment in such a from starch derivatives and the like. 3. Method of making the grid according to claim i,: characterized: characterized in that the union. , the granule : achieved by treatment with suitable solvents or swelling agents, possibly beforehand the granules by filling the spaces with rubber cement and the like from each other isolated. q .. execution of the method according to claim 3, characterized in that : that for the production of the grid different colored granules are used which also j.e are swellable in various solvents. 5. Execution of the Method according to claim q., Characterized in that: the gaps with a colored Colloid filled out in a different solvent than the two already did applied different colored granules swell: bar is.