DE881447C - Method for generating correction images, in particular mask images, in multi-layer color materials - Google Patents

Description

Method for generating correction images, in particular mask images, In multi-layer color materials it is already known, correction images, in particular Mask images to produce multi-layer color films on a separate substrate and immediately or never afterwards to be brought into congruence with the multilayer material. Diocesan procedures are all fraught with more or less difficulties and are suitable It is not suitable for larger images, while for example in the case of motion picture films, this is the case Combination of multi-layer film and correction image a rumbling, technical one Requires effort.

Furthermore, methods are known which, in order to avoid the separate layer carrier, have the production of the correction image in the multilayer material itself as their object. This happens z. B. ' by bleaching the first developed silver with special bleaching agents and fixing it with little or no impairment of the R: estbromilbers. The residual bromide silver can then be developed again into a correct image in black and white or in color. Na-ch another method, the ewandelt Restbromsilber in a hard fixie # rbares Silbersialz order, so that the developed and g bleached silver can be fixed normal. The sparingly soluble silver salt formed from the residual bronze silver can then be blackened in various ways and fixed with a strong fixing agent.

These procedures require a significant extension of the treatment process. A simplification and a better effect are to be achieved according to the invention. D. le-g amount of silver formed in the Farbenmicklun, ## is in fact extremely geting and the amount of remaining silver bromide do so. It is great that, due to the flat gradation of the silver image produced during color development, only ineffective mask images can be produced using the residual bronze silver.

The production of correction images is now particularly easy. within of the multi-layered material, whom to ensure that more silver develops and the amount of residual bromide silver is vermih-dext. This can be done according to the invention achieve that, one in the development of the correction image together with the color development or, divided from it, even more silver develops, ial that corresponds to dye formation, whereupon the siamte-developed silver after being converted into a compound that lekh-ter.iails that may be difficult to dissolve. made residual halogen silver fixable is removed. This results in the ratio of developed silver / residual bromine silver and the gradation. of the residual bromide silver image so changed that with the simplest of further treatment, z. B, partial fixation, effective correction images are obtained. The effectiveness of the mask image is largely determined by the duration and strength of the Sdhw, axzweißentwicIdLmg or fixation time can be influenced.

The developed silver is converted into a silver compound that is easier to fix than the halogenated silver, e.g. B. in silver chloride or silver ferric cyanide. The fading ka =, z. B. with copper chloride, Kali = -ferricy.anid # o, cler p-Nitros # odiincthylanihn. Suitable fixing agents which do not attack or only slowly attack the residual halogen silver are, for example, ammonia, ethylenediamine, polyamine or sodium sulfite. The Riest halogen silver is either, if necessary, fixed or blackened by conversion into Ag or Ag2S until the mask image of the desired strength appears. - , You can. Either the color development and additional silver development are carried out together in a developer or, after the color development, a second development followed by a black and white developer. In order to achieve the necessary difference between the residual halogen silver and the developed silver transformed into a soluble silver sulphate, the residual halogen silver can be edged in iodized silver or in a known manner into a poorly soluble organic silver compound. The developed silver can be converted into compounds which are easily soluble in sodium thiose sulfate. Four bonds are also possible, which are easily soluble in ammonia or organic amine bonds. It is also possible to convert the developed silver into compounds that are easily soluble in sodium sulfate.

The nest halogen silver can also be used before or after fixation by Development or chemical agents are blackened.

Two-layer color films in which the dye components are incorporated in a non-fusion form are used as the multilayer material. Such materials are e.g. B. in the "Photographisch-en Korrespondemm 1 93 8, p . 21, and 1939, p. 106, described. Of course, different types of color films can also be used.

The implementation of the process is to be explained in the following examples: Example i A multi-layer color film negative is so. Color developed much longer than the loss of gradation caused by the masking process must be compensated for. It is then subjected to a black and white secondary development without intermediate exposure. This is done in a vigorously working developer, e.g. B. Hydroquinone Bottasche developer made. The silver beer produced during the first and second development is bleached with a mixture of copper sulphate solution and saline solution (e.g. 5 % each ). The resulting chlorosilver is fixed with sodium sulfite solution while preserving the residual bronze silver (e.g. 200, loige solution). The residual silver bromide is then fixed with normal thiosulf, a, t-fixing bath until, in addition to the color negative, a positive silver bromide of the desired strength remains as a correction image. Example 2 First and second development of a multi-layer color film negative are to be carried out according to Example i. Then the film is used to convert the bromide silver. bathed in a potassium iodide solution. After the developed silver has been bleached with potassium ferric acid solution (100%), it is fixed with sodium thiosulfite solution (eg 200/0i # -,). The ferrocyan silver is quickly dissolved out, while the iodine silver fixes very quickly. So lets . 9-9 create an iodized silver mask of any strength depending on the duration of the spring. Example 3 First and second development as well as conversion of the developed silver to 1.9-t according to Example 2. The bleaching solution used is fierricyanide instead of potassium. Mixture of copper sulphate and sodium or potassium chloride related. The resulting chlorine silver is dissolved by sodium thiosulf "a, tfixierb, ad, gielder much more quickly than iodine silver, so that a mask of the desired density can easily be achieved here as well Examples 1 to 3. The 9, esthalogen is blackened before or after fixation with sodium thiosulfate by development or chemical agents such as alkali sulfide.

Example 5 A multilayer color film negative is developed in a suitable mixture of color developer and black and white developer for richer silver deposition. The further processing for producing AD this correction image can then take place according to Examples i to 3 .

Claims (2)

PATENT CLAIMS: i. Process for the generation of correction images, in particular mask images, in multi-layer color materials, characterized in that during the development of the correction image, either together with the color development, or separately therefrom, more silver is developed than the dye formation - with the chromogenic. Development corresponds to whereupon all the developed silver after conversion into a compound which is easier to fix than the residual halogen silver, which may have been made more difficult to dissolve, is removed. 2. The method of claim i, characterized denotes Ge, that a second development is carried out with a black and white developer after color development. 3. The method of claim i, characterized denotes Ge, that carried out the color development and additional silver development in a developer mixture together is. 4. The method according to claim i to 3, characterized in that the residual bromide silver is converted into iodized silver. 5. The method according to claim i, characterized in that the residual silver bromide is converted into an organic silver compound which is sparingly soluble in thiosulfate. 6. The method according to claim i, characterized in that the developed silver is converted into a compound readily soluble in sodium sulfate: sulfate. 7. Process according to claim i, characterized in that the developed silver is converted into a compound which is readily soluble in ammonia or organic amino compounds. 8. The method according to claim i, characterized in that the developed silver is converted into a compound readily soluble in sodium sulfite. G. Process according to claim i, characterized in that the res thalogen silver is blackened by development or chemical means before or after the fixation.