Support for imaging material

A support for imaging materials which comprises a paper mainly composed of natural pulp as a base, a resin layer (A) comprising a resin having film-formability coated on one side of the paper base on which an image forming layer is provided and a resin layer (B) mainly composed of a polyethylene resin coated on another side of the paper base, wherein the natural pulp has a fiber length of pulp as defined below of 0.60 mm or less, the paper base has a density of 1.05 g/cm3 or more, and the resin layer (B) mainly composed of a polyethylene resin is coated at 200 m/min or more, wherein said fiber length of pulp is determined by the following procedure:

• immersing a paper base of 4 cm×4 cm of a support for imaging materials in 80 cm3 of a 1.0 N aqueous sodium hydroxide solution for 3 days and then sufficiently washing with water,
• adding water to the paper base sufficiently washed with water so as to prepare a 3 wt % aqueous slurry,
• macerating said paper base by a dispersing apparatus not so as to cut the fibers to obtain a pulp slurry, and
• measuring the average fiber length of the pulp in accordance with JAPAN TAPPI Paper and Pulp Test Method No.52-89 “Paper and Pulp Fiber Length Test-Method”.