SU40713A1 - The method of reproduction of color raster images - Google Patents

Description

Yri of all methods of color photography and cinematography, for printing color positives, very much like the way of shooting and the way of printing, you must have two (Two-color) or three (three-colored) separate negatives corresponding to the individual components of the image, colors.

Raster color kiro films and raster photo shoots (such as “Autochrome”) in the ODEOM frame still have all three colors. The negative shot on them turns into a positive, which is unique. It has not yet been possible to multiply it, as a result of which raster methods are only used in amateur practice, where a single positive sample is sufficient.

Meanwhile, raster methods take one of the first places in terms of the quality of transmission of NATURAL colors. They differ favorably from the other three colors because of the combination in one frame, on one film of all three. This eliminates both temporal and spatial parallaxes and makes it unnecessary to complicate the imaging equipment that other methods require. One might think, therefore, that if a raster snapshot could be propagated, then a raster tricolor would supplant many other methods would have occupied the most prominent place in the practice of cinematography and photography. ....

- This offer allows you to use an iodine scan from the raster position of three MGAS, iw)

tivov, corresponding to the three main colors of the image, for subsequent printing with them by any means of color positive.

It is best to print using pinatipia or hydrotypes, i.e., turning a silver negative in an ozbromic or other similar solution into a single oak gel embossed cliché, and printing from three such cliches, in three liquid transparent paints, on the same gelled paper ( photo) or film (movie).

Some disadvantage of raster images is their coarse-grained struBTur, which, when hydrotyped, turns into some kind of blur. This unsharpness, however, can be compensated for by printing it onto a white film or paper, and a slightly undercored, pale bromide-silver print made from a green negative. This gives greater contour sharpness and a deeper black top ten m.

As is known, the plates of the Lumière Autochrome, Ompicolor Jugla, the colored plates of AGFA, the film-film Lignose and others have a layer of colored transparent grains of blue-violet, green and orange-red under the emulsion layer, through which the bromide is exhibited silver. The negative in the inversion solution turns into positive. From this positive, a sequence has been produced, with three monochromatic light: x, on three plates (films); In the case of violet light, a simple plate (plbnk5g), light ffiejUOML in light — aa ortho-chromatic plate (film) and in red light — a panchromatic plate (film). Violet light will pass to the photosensitive layer only through the purple grains of the raster and will print all the purple dots of the positive inversely proportional to their density, i.e., 6, simply weed out and will print the negative yootvotvuyuschuyu purple color with EO.Ob.1: a. Also, exactly yellow and red lights will give negatives corresponding to the green and orange-red color of the removed object. The light must be strictly monochroic, for which a thick light filter of the same color as the grain of the raster is placed in front of the light source, with some corrections to the photosensitivity of the emulsion. So, for example, to get a green negative on an orthochromatic emulsion, it is better to take a yellow filter in order to cut blue N, violet rays, yellow rays that pass through orange-red grains cleaner, the orthochromatic emulsion almost never perceives. The resulting negatives have a coarse-grained structure, which, however, subsequently disappears in hydrotype printing due to some ink spreading. Taking into account some raster positives, occur due to the small thickness of the layers and the low contrast of their emulsions, and taking into account that the negative, reproduced, for example, through chewing grains, is diluted n) ozrachdy.mp tgromelgutjB H, left red and blue 5er | H and a simple orthochromatic achromatic emulsion for cochirrky is needed. to make the b gamma of contrast not to the left -, mp4, c, with a large amount of silver (high latitude) and also about increased; Herod, obshnoy, thick gelatin for better relief future cliché. it is known that Lipmap to Burton was compiled, and the company “Kodak realizes an optical raster called film“ Kodacolor. On the film from the glossy side, it squeezes out with special rollers of the lens unit with a focus equal to the thickness of the pelluloid. 8, a circular filter divided into three dimensions of three colors is placed on the lens of the surround apparatus. The removal of the screw is made by a dluloid, and the lenses give the filter image to iibcflfa. Blackening || 1Шр | 1 | onadno color vividness. The negative ischite 6 is positive and is colored at the moment of the projection of the screen by a triple filter in the lens of the projector, similar to the camera one. To obtain from such a colorless 1 ozitiv, negative, corresponding, for example. the red image of the image, it is necessary to print in light, which would fall on the positive only from where the red light fell from when shooting. To do this, the light source should be made in the form of a circular glass (behind the projection wall and a wall), which is equal to the diameter of the filter of the imaging device, and the distance to the frame is equal to the distance of the filter to the frame when shooting; with the leg close the part to leave open and light only that; the segment that the filter is painted in this color. When printing a red negative, it is necessary to leave: the segment that is colored red at the film filter is open. The light, refracted in the lenses, will fall on the layer only to those points where the darkening caused by the color of the object is caused to darken, and thus prints out only a red image. When printing a “green negative,” open the segment corresponding to the green filter segment. Same n dl blue-violet. In this case, the emulsion for copying can be simple, the amount of silver and the thickness of gelatin are increased, as well as for copying color-raster images. and optical, it may be desirable to have a negative image on the silver not on the outside of the layers, but inside (which is usually obtained by printing from the substrate side) so that the tanned gelatin of the future cliche also lies inside the layer, on the substrate, and not on top of lay In this case, when processing the raster image, it is not necessary to turn it into a GOSP, but after the first scan it is fixed, as a usual negative, we need to print monochromatic positives from it, which we can already turn into negatives in the reversing solution. Silver in this case (P lay in the depth of layers; pictures; differing in that, monochrome negatives are made from a positive color in a purple raster-positive raster; in both cases, as with a color raster; Briefly Section 1, Method of breeding color raster

If a light is on a simple film, whether a plate, on a yellow one, on an ortho-1 puppy puppy or cluster and npw red euvteia davromat chesuyu film or plastic film, then print successively, according to the well-known fiHHtitHaiin method, on the same spini or paper, the corresponding pattern will be printed.

2. Change the way but n. 1. vtli and oschees i4M, to at nspolzovanad vozitdva optical raster Pescia with three positive moaohromnyh vtssat Islands tsronzvod t, pozntnv stochaivom illuminating light, n eyutsim eagme form one or sector eootvetstu .yuschego segment or sector daatsoge color filter when shooting .