The invention of the photographic paper

The invention of the photographic paper

The invention of the photographic paper

Problem to be solved by photographic paper

There is a need for color photographic paper with improved sharpness, opacity, and reflective properties.

Summary of the photographic paper

The invention provides a photographic element comprising a paper substrate with a polyolefin coating provided on at least one surface, a hydrophilic colloid layer on the polyolefin coating, and at least one light sensitive silver halide emulsion above the hydrophilic colloid layer, wherein said hydrophilic colloid layer comprises a removable antihalation material and about 20 to 85 percent by weight white pigment In a preferred embodiment of the invention, the hydrophilic colloid layer comprises a removable antihalation material and from about 20 to 80 percent by weight of a white pigment, and from about 15 to 35 percent by weight of hollow microspheres having a diameter of from about 0.1 to about 1 m. It is preferred that the hydrophilic colloid layer contain an optical brightener.

Advantageous effect of the photographic paper

The invention provides a polyolefin coated inkjet paper having improved sharpness wherein on the free surface of a polyolefin layer a hydrophilic colloid layer containing removable antihalation material and white pigment is coated. The combination of white pigment and removable antihalation material provides the advantage of improved whiteness and effective antihalation all in one layer. The preferred hydrophilic colloid layer contains antihalation material, from about 20 to about 80 percent by weight of a white pigment and from about 5 to about 35 percent by weight of hollow microspheres having a mean diameter of from about 0.2 to about 2 m.

The dispersing aid or aids are generally present in an amount of from about 0.05 to 2 and preferably from about 0.05 to about 0.5 percent by weight based on the dry ingredients present. The coating composition is then applied by any suitable coating technique on appropriate coating equipment to the surface of the polyolefin layer which has been coated onto the surface of the raw paper stock in accordance with the commonly accepted practice in the photographic paper industry. The paper stock generally and preferably contains layers of polyolefin on both sides of the paper stock. In many instances, different types of polyolefin will be applied to either surface in order to aid in curl control of the paper.

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