Photographic support
AssigneeMitsubishi Paper Mills Limited
InventorsMasao Miyama, You Kusama
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Abstract
A photographic support comprises a paper coated on both sides with polyethylene resin film. For providing improved cutting property of the paper when it is used for a photographic paper and subjected to an automatic printer/cutter, strength reinforcing and sizing agents contained in the support are made such that amount ratio of the former to the latter is at least 1.8. To impart the paper a desirable stiffness and further improved cutting property, polyvinyl alcohol fibers which are neither heat-treated nor acetalized, in 5-25 parts by weight, are mixed to 100 parts by weight of woodpulp fibers when the paper is formed. This allows to make the paper as light as 160 g/m.sup.2 or less but having stiffness property pertaining to photographic papers.
Claims4
A photographic support which comprises a paper made from woodpulp fibers and containing a sizing agent and a strength reinforcing agent, and a polyethylene resin coated thereon, the bone dry weight ratio of said strength reinforcing agent to said sizing agent being 1.8-4.0 to 1 and the amount of the sizing agent being 0.3-10.0% by weight of the woodpulp fibers, wherein said polyethylene resin coated on the back side of the paper contains 35-80% by weight of low-density polyethylene, wherein woodpulp fibers constituting the paper stock have fractionation characteristics in accordance with the fractionation method specified in JISP8207 such that 0% is retained by the first wire sieve cloth having a sieve opening of 710 .mu.m and not more than 35% is retained by the second wire sieve cloth having a sieve opening of 350 .mu.m.
Dependencies are inferred from the claim text.