摘要:
In a process for the preparation of a multilayered photographic material in which the layers are applied in at least two stages and the material is dried and wound up in between the stages, sticking of the semi-finished preparations does not occur if the uppermost layer applied in the first stage contains polymer particles soluble in alkali and having an average particle diameter from 0.2 to 5.0 .mu.m.
摘要:
In a process for the processing of color photographic silver halide material which has been exposed to form an image by development, bleachfixing, washing or stabilization and drying, the aqueous developer solution being free from benzyl alcohol, the pH value of the bleachfixing solution, which contains an iron(III) complex salt, being below 7 and the bleachfixing solution containing a compound corresponding to general formula (I) ##STR1## in which Z represents the atoms required to complete an optionally further substituted heterocyclic ring andR.sup.1 represents hydrogen or an alkali atom,and a coupler containing an activated methylene group, in which a hydrogen atom is replaced by alkyl, cycloalkyl, aryl or aralkyl and reacts with the oxidation product of the color developer to form colorless reaction products, bleaching can be carried out free from residual silver with a low regeneration level of the bleachfixing bath without any water-insoluble precipitates being formed.
摘要:
A magnetic tape cassette, in which the activation of the front flap (11) and of the slide (15) is coupled by cassette-side means, contains a side part (12) of the front flap provided with a recess (20) in which a guide peg (18), which rests in the sidewall (16) of the slide, engages with the recess and thus couples the swivelling movement of the front flap with the sliding movement of the slide. In another embodiment, the side wall (12) of the front flap (11) contains a guide peg (22) which engages with a recess (21) provided in a side wall (16'') of the slide (15) (FIG. 3, FIG. 5).
摘要:
A color photographic recording material containing a coupler which releases a photographically active compound.Couplers corresponding to formula (I) couple with color developers to form yellow to yellow-orange dyes and, in doing so, release the residue X as a photographically active compounds. Where X is a development inhibitor, remarkably high inter-image and edge effects can be obtained. ##STR1## in which R.sup.1 represents alkyl, a heterocyclic or carbocyclic aromatic group or -NH-CO-R.sup.2 ;R.sup.2 represents alkyl, aryl or -NH-R.sup.3 ;R.sup.3 represents alkyl or aryl;Q represents the groups to complete a fused, optionally substituted benzene or heterocyclic ring;X represents the residue of a photographically active compound;TIME represents a bond which, on reaction of the coupler with the oxidation product of a color developer, is released together with the residue X attached thereto and, in turn, releases the residue X as a photographically active compound under the development conditions;n=0 or 1.
摘要:
5-pyrazolone compounds which are substituted with a thioether group in the 4-position may be prepared by the reaction of a 5-pyrazolone compound which is unsubstituted in the 4-position with a sulphenic acid amide. The resulting 5-pyrazolone compounds substituted in the 4-position are suitable for use as 2-equivalent magenta couplers in color photographic recording materials.
摘要:
A colored original to be copied is scanned point-by-point in each of the three primary colors red, green and blue. A series of imaging signals is generated for each primary based color on the scanning operation. The signals are subsequently converted into a colored optical image of the original by means of a cathode ray tube which prints the image on color copy material. Prior to conversion, the signals are processed to electronically enhance the image. Following electronic image enhancement, the signals are adjusted to the characteristics of the copy material. The adjusted signals are now modified so as to make them proportional to the illumination intensity of the cathode ray tube or to the logarithm of the illumination intensity. The modified signals are next corrected to adjust the gray balance and/or the contrast of the image. This is accomplished either by multiplying each series of modified signals with a respective correction factor or adding a respective correction factor to each series of modified signals. The signals are thereafter fitted to the characteristic function of the cathode ray tube which then prints the image.
摘要:
A colored original is scanned in each of the three primary colors red, green and blue to generate a series of electrical imaging signals for each such color. The signals are electronically processed and then sent to a cathode ray tube having a screen which is coated with a phosphor. The cathode ray tube successively converts the signals of the different series into optical images having the respective primary colors red, green and blue. The images are formed on the screen of the cathode ray tube thereby exciting the phosphor which luminesces to generate printing light. The differently colored images are successively printed on photographic color paper using the printing light emitted by the phosphor as well as respective red, green and blue filters. The phosphor is a rare earth phosphor which emits strongly in the red region of the spectrum and only weakly in the green and blue regions of the spectrum. The weak emissions in the green and blue regions of the spectrum are compensated for by using dichroic green and blue filters having high transmissivities. On the other hand, the strong emission of the phosphor in the red region of the spectrum is balanced by employing copy paper having relatively low sensitivity in this region. Such compensation and balancing make it possible to achieve equal or almost equal exposure times in the different primary colors.
摘要:
An original to be copied is electrooptically scanned point-by-point. The resulting imaging signals are stored in a first memory and then forwarded to a first image processing unit where the signals are electronically corrected to enhance the image of the original. The corrected signals are loaded into a second memory. A portion of the corrected signals is recalled from the second memory and sent to a third memory. This portion of the corrected signals is then transmitted to a second image processing unit and thereafter converted into a low-resolution video image which can be inspected to determine image quality. If image quality is satisfactory, the contents of the second memory are sent to an exposure unit which prints a high-resolution image of the original on copy material. Imaging signals for a second original are loaded into the first memory as the contents of the second memory are recalled for printing. The second processing unit functions to adjust the video image so that it closely corresponds to the printed image of the original.
摘要:
A method for adjusting the color saturation during electronic image processing, in which a two-dimensional original image is electro-optically scanned along rows and columns for three primary colors and the resulting image signals are transformed into a luminance signal Y and two color-difference or chrominance signals C1, C2. A pre-selected adjustment of color saturation is used, in which, in accordance with a non-linear characteristic curve, small chrominance signals C1, C2 are more amplified than larger chrominance signals C1, C2 corresponding to a higher degree of saturation.
摘要:
Color photographic recording material which contain pyrazolone magenta couplers, in particular 3-acylaminopyrazolone magenta couplers, have increased stability to formaldehyde if a compound corresponding to formula (I) is used as oil former for the magenta couplers:A[-(R.sup.1).sub.1 -L-(R.sup.2).sub.m -B].sub.n (I)In the above formula,A, B each denote a hydrocarbon group optionally substituted by COOH, OH or NH.sub.2, at least one of the groups A and B being a bicyclic or tricyclic hydrocarbon group with at least 7 carbon atoms optionally substituted by COOH, OH or NH.sub.2,R.sup.1 and R.sup.2 denote an alkylene group with 1 to 6 carbon atoms,L denotes CO--O, O--CO, CO--NH or NH--CO,l and m have the value 0 or 1 andn has the value 1 or 2.