초록 ▼

The invention relates to a photographic element comprising a paper base, at least one photosensitive silver halide layer, a biaxially oriented polymer sheet between said paper base and said silver halide layer, wherein said polymer sheet has a thickness of between 13 microns and 65 microns and a You

The invention relates to a photographic element comprising a paper base, at least one photosensitive silver halide layer, a biaxially oriented polymer sheet between said paper base and said silver halide layer, wherein said polymer sheet has a thickness of between 13 microns and 65 microns and a Young's modulus of between 700 and 5200 MPa wherein said base paper has a Young's modulus between 1380 MPa and 13800 MPa, a thickness between 75 microns and 200 microns, and an average roughness on the emulsion side of between 0.18 and 0.68 microns and wherein the ratio of thickness between said polymer sheet and said base paper is between 0.1 and 0.5.

대표청구항 ▼

[ We claim:] [10.] A photographic element wherein said element comprises at least one photosensitive layer, a base paper, and a biaxially oriented polymer sheet between said base paper and at least one photosensitive layer wherein said base paper has a Young's Modulus between 2100 MPa and 3500 MPa i

[ We claim:] [10.] A photographic element wherein said element comprises at least one photosensitive layer, a base paper, and a biaxially oriented polymer sheet between said base paper and at least one photosensitive layer wherein said base paper has a Young's Modulus between 2100 MPa and 3500 MPa in the cross direction, thickness between 152 and 230 micron and a roughness average on the photosensitive top side of between 0.5 and 0.7 micron and wherein the properties of the polymer sheet are determined according to a linear formula for predicting the ratio of final smoothness to initial smoothness of said base paper on Formula I ]EQU6 ] "caliper"=thickness of the polymer sheet in .mu.m Modulus is in units of MPa. [11.] The element of claim 10 further comprising a copy restrictive pattern of microdots positioned between said at least one silver halide layer and said biaxially oriented polyolefin sheet.