Abstract: Undesired color fog obtained on color development of a color photographic material with a primary aromatic amino color developing agent may be reduced when the development is carried out in the presence of an antifogging agent (antistaining agent) of the formula ##STR1## in which R.sup.1 is an acyl group and R.sup.2 and R.sub.3 are (same or different) hydrogen, alkyl, halogen, sulfo or carboxyl.The antistaining agent is preferable incorporated in non-diffusible form in one or more of the layers of the photographic material.

Abstract: New 2-equivalent yellow couplers of the structure ##STR1## in which X represents a ring member selected from N and C; Y completes a 5-, 6- or 7-membered nitrogen-containing ring; R represents alkyl, aryl, alkoxy or heterocyclic ring; and A represent a yellow coupler radical provide high maximum color densities together with low fog on storage under humid conditions.

Abstract: Desirable 2-equivalent yellow-forming couplers in which a 1,3-diazolone-2-ring as splittable group is attached by the nitrogen in its 1-position to the coupling position of the 2-equivalent yellow-forming coupler and in which the diazolone ring has a C.dbd.C double bond adjacent to the nitrogen atom in its 1-position, have improved photographic properties in particular with respect to improved reactivity on chromogenic development and improved stability of the couplers as well as the dyes produced from them on chromogenic development in a photographic material which has been subjected to storage under moist and/or warm conditions.

Abstract: Color photographic material containing a fast-acting hardener, which acts by activating carboxyl groups, wherein said material contains a 2-pyrazolin-5-one coupler precursor corresponding to one of the following general formulae I or II: ##STR1## wherein EACH OF R.sup.1, R and Y are substituents of the type used in 2-pyrazolin-5-one color couplers, andZ represents acyl, alkoxycarbonyl, aryloxycarbonyl,Or ##STR2## in which R.sup.1, R, and Y have the above-defined significance, and A represents an alkylene group or an arylene group.

Abstract: Monocyclic oxazolinone-2 structures make good 2-equivalent photographic couplers, the oxazolinone-2 ring splitting during the coupling to form a dye. The couplers can be made by condensing an .alpha.-halocarbonyl compound with an inorganic cyanate in a substantially aprotic solvent that can contain a small amount of water.

Abstract: Oxazolinone-2 derivatives having a releasable mercapto group in their 5-position are provided as development-inhibitor-releasing thioether compounds for use in color photographic material having a high reactivity on chromogenic development of color photographic material, and are very easy to prepare.

Abstract: A process for hardening protein-containing, preferably gelatin-containing, photographic layers wherein as hardeners unsubstituted or substituted esters of 2-substituted, 1,2-dihydroquinoline-N-carboxylic acids and/or unsubstituted or substituted esters of 1-substituted 1,2-dihydroisoquinoline-N-carboxylic acids are used.

Abstract: Diffusion-fast yellow couplers for color photographic silver halide materials with at least one silver halide emulsion layer are provided containing a substituted or unsubstituted 2-cyclotetramethylene sulfone group in a non-coupling position of the coupler molecule which couplers are excellently emulsifiably in color photographic emulsions, are highly reactive and stable under heat and tropic conditions. The dyes produced from them by chromogenic development in color developers containing aromatic components of the p-phenylene diamine series which contains at least one primary amino group are eminently stable under heat and tropic conditions, have a low side absorptions in the unwanted region of the spectrum and low fog values.

Abstract: For measuring a two-dimensional temperature distribution a thermographic film is used which consists of a layer containing temperature-sensitive liquid crystals and an antireflection layer. The film is arranged an auxiliary support which is removed from the film before measurement. Only small layer adhesion forces prevail between the thermographic film and auxiliary support.

Abstract: Improved 5-pyrazolone couplers of the following formula ##SPC1## wherein R,R.sub.1 R.sub.2,X and A denotes as described hereinafter for use in lightsensitive color photographic materials which are easy to prepare and give rise after chromogenic development to magenta dyes with improved stability to light.