DE1058839B - Process for copying or reproducing color images using color masks - Google Patents

Description

kl. 57 b 18/08

INTERNAT. KL. G 03 C

PATENT OFFICE

G23457IVa / 57b

A N M E L D E T A G: DECEMBER 2, 1957

NOTICE
THE REGISTRATION
AND ISSUE OF THE
LEGAL LETTERING:

June 4, 1959

It is well known that photographic copying of a colored object results in significant color distortion. To reduce this evil, use PREVIOUSLY ¹ SWEET and especially colored masks.

Next to . the known method according to which the two or three most important masks are obtained separately be what. is very time consuming, are also procedures known, according to which all required ", Masks generated 'at the same time' in a single material will. It is known to use a material with two emulsions, one for green and the other other is sensitive to red light. The green-sensitive one Emulsion would be either a yellow or a green dye former or a Mixture of a yellow and a cyan dye former contain. It is also known to separate the yellow and cyan dye formers Add emulsion layers. The red sensitive emulsion would be either a purple or a Contain blue dye formers or a mixture of a magenta and a cyan dye formers. Even it is known to add the magenta and cyan dye formers to separate layers.

If you want to work according to the known method in which the green-sensitive emulsion or emulsions a green dye-former and the red-sensitive emulsion or emulsions a blue dye-former contain, so 'consists of lack of blue, in particular but only the possibility of green dye formers, on the one hand, a mixture of a blue-green and a yellow dye-former and, on the other hand, a mixture of a cyan and magenta dye-former to use. Because it is practically impossible to have two different types in one emulsion So one would allow housed dye formers to take part in the color development at the same time be forced to produce a material with four emulsion layers.

It has now been found that a color mask is expediently used for copying the color image, obtained by copying the color image onto a multilayer photographic material in which a yellow green filter negative of the image to be copied, a purple red filter negative and creates a teal image representing a combination of the green filter and red filter negatives became.

It has also been found that a simple multilayer material can be used to produce the color mask can use that in addition to the green-sensitized layer with yellow dye formers and the red-sensitized Layer with purple dye-former contains only one further emulsion layer, namely a green process for copying

or reproducing color images

with the help of color masks

Applicant:

Gevaert Photo-Producten N. V, _r -Mortsel, Antwerp (Belgium)

Representative: Dr. W. Müller-Bore, patent attorney;
Braunschweig, Am Bürgerpark 8

Dr. Maurice Antoine de Ramaix, Hove, Antwerp / and Valere Frans Danckaert, Mortsel, Antwerp

(Belgium),
have been named as inventors

and a red sensitized layer containing a cyan dye former.

This single layer advantageously replaces the one already in place proposed two separate layers. With the known use of a purple dye former, So a dye former that becomes a green absorbing. By the way, dye leads is the disadvantage related that the significant side absorption of blue light by the blue-green dye is not is corrected. The color image is copied onto this material to produce the color mask. ... ■ It was also found that this correction of the secondary absorption of blue light by the blue-green dye is more or less achievable, if, instead of the purple dye former, a dye former is used which is a reddish purple until results in red color.

Practical embodiment of the invention will now be described in detail, without hereupon to restrict. In practice there are still many variants, for example with regard to the order of the Layers and their treatment, possible.

The following layers are poured one after the other onto a transparent carrier with an antihalation layer on the back:
1. a red-sensitized emulsion layer which contains a magenta, red-tinged purple or red dye former. As a purple dye, for example, o-hexadecenylsuccinylamidoindazolone, as a reddish purple dye 1-p-sulfophenyl

909 529/410

Claims (1)

&;; y <fj- <- ^ ~ - · ΐ j 058 839 ^1; - "'■■■ ■ *> ■■■ ** ■■ ... 3. ^R. ' - · ...; 4 3-octadecylpyrazolone (5) and, as a red dye, also by contact of the emulsion side with the emulsifier S-m-hexadecenylsuccinylamidophenyl side. 5-cyanmethyloxodiazole can be used; '' It is also possible to use a special .2. ,, Blaugrünfarbstpffbildnet such as 4-sulfo _{'5; (a} green-and red-sensitized emulsion layer / ■ * means for adjusting the mask on full-H a.. Continuous contours cover the masking concerned l-oxynaphthoic acid- (2) -octadecylamide or 4-Sul- material in combination with a magnifying : i > iö-l-oxynaphthoic acid ⁱ - (2) -2'-hexadecyloxy-5'-sul- device or a repro camera for masking purposes ,, ._ ,,. fpanilid. contains; . use, e.g. B. when creating color separations o? 'a green-sensitized layer that creates a yellow color of a multi-color original (painting) by reflex coloring agents such as p-stearoylamiriobenzoylaceto action; in this case the mask is 3-5-dicarboxyanilide contains; ^: - Aisle of the camera set up. 4. a yellow filter layer, for example colloidal from such; received assembly can through Contains silver. The yellow filter layer can be omitted, contact or optically either cor- if a yellow filter is used during exposure. · Yawed color separations for graphic purposes or copies Proceed with this material as follows: 15 on three-layer materials (normal or reverse The color image to be copied will be generated by contact or development. , _(: optically to the above-mentioned multiple '.'. ' schichtenmateriai copied. The latter then becomes 5 minutes = patent claims ten at 21 ° C in a color developer, for example 1. Method of copying or reproducing the following composition: ... 20 of color images with the help of color masks, so that T -..... ,, ...... characterized by that when photograph! see Diethylparaphenylenediamine chlorine Copy the color image to be copied under y ra ........., ..... · .. g interposition of a mask image copied Sodium sulphite (anhydrous) ...... _4 g this _{becomes through} | _{o ieren of Farbbi} i _of a Natnumcarbonat (anhydrous ... 50 g ₂₅ multilayer material was obtained in which a ium romi g _e j _n g _e i _bes green filter negative of the copy to be copied Hydroxylamine chlorohydrate ......, 2g image, one purple red filter negative and one Water up to ...................... 1000 rf blue-green image that is a combination of the green-subsequently the material is produced in filter negative and red filter negative for 2/5 minutes Rinsed in running water and placed in a bleach-fix 30. bath for example, the following composition 2. The method according to claim 1, characterized in treated: . draws that the red filter negative reddish purple '""' T ^ "'". ■■ +,, j. . _, or colored red. .,. Monosodium ethylenediammetra- _ ■ _ 3 Three-layer _{photographic material for} _ acetic acid iron salt., 37.5 g implementation of the method according to claim 1, _{Trisodium ethylenediamine tetra characterized by the fact that it consists of the following ΛΤ} ^e .f ^S - ^lgS: ^ ^e 'tVV / Y'.V "} S ' ^g layers: a red-sensitized Sodium thiosulphate (anhydrous) .. 100 g ϊ & χάΛ, which contains a purple dye, Sodium sulfite (anhydrous) 10 g _{a green} . _{and rotsen} ; _ib i _liized layer, the one 1 hioureum contains 5 g _4Q blue-green coloring agent, and a green- - ^ -_ ^Wasserbls ··· OOOcmä sensitized layer, a DIE Gelbfarbstoff- and finally rinsed for 10 minutes and then contains formers. , · ^: - dry, dry. 4. Three-layer photographic material after Claim 3, characterized in that the red The color-correcting and contrast-sensitized layer obtained in this way instead of a magenta dye-lowering layer The mask can now use a red-tinged purple or red dye with the copier to be copied Contains color material for complete grain coverage. . ; set '' ... This contour coverage of 5. Photographic three-layer material according to Mask and original ¹ can in the usual way, namely claims 3 and 4, characterized in that when the emulsion side of the mask comes into contact with the 50, the top layer also forms a yellow filter layer. Backing of the color slide positive or negative or * holds. ^; ", '' -