Abstract: In a support for a photographic printing paper, in which water-proof resin layers 2, 3 are formed on both sides of a base 1, one of the water-proof resin layers 2, 3, at a side of an emulsion to be coated, contains titanium dioxide pigment. The surface of particles of the titanium dioxide pigment is treated with a silane coupling agent. Preferably, the surface of titanium dioxide is subjected to surface treatment with an inorganic surface treating agent, and subsequently, is treated with the silane coupling agent. Further, silicone oligomer is preferably used as the silane coupling agent. As a result, a support for a photographic printing paper can be provided which causes no film fractures in the water-proof resin layers and no score lines in a die-lip portion, provides excellent adhesiveness to the base, and is superior in image sharpness.

Abstract: A support for a photographic printing paper comprising a substrate and a waterproof resin coating layers provided on the both sides of the substrate, wherein at least the waterproof resin-coating provided on the side of the substrate on which an emulsion for forming an image is coated comprises i) a lowermost waterproof resin coating layer contacting the substrate and ii) at least one upper coating layer containing a waterproof resin capable of melt-extruded at a temperature of from 170.degree. to 290.degree. C. and containing uniformly dispersed titanium dioxide, and a method for manufacturing the support by melt extrusion.

Abstract: A photographic support comprising a paper sheet coated with a polyolefin resin on both surfaces thereof, in which at least one of the polyolefin resin layer comprises:40-75 parts by weight of a high density polyethylene having a melt index of 15-40 g./10 min. and a density of not less than 0.945 g./cm.sup.3, and60-25 parts by weight of a low density polyethylene having a melt index of 1-40 g./10 min. and a density of not higher than 0.930 g./cm.sup.3.

Abstract: A photographic printing paper support is described, comprising a base paper having a polyolefin layer formed on both surfaces thereof, said support having provided on a back surface thereof a writing property providing layer composed of (a) inorganic pigment having an average particle diameter from 0.1 to 2.0 .mu.m and oil absorption degree of 100 cc/100 g or less, and (b) an acrylic emulsion having a glass transition point of from 20.degree. C. to 50.degree. C.