Photographic element

Radiation imagery chemistry: process – composition – or product th – Radiation sensitive product – Structurally defined

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Details

430501, 430140, 430523, 430531, 430533, 428694B, 428694BG, 428694BS, 428694BN, 428694BA, G03K 176, G11B 5708

Patent

active

054910510

ABSTRACT:
A photographic element comprising a support having provided thereon a light-sensitive layer and a transparent magnetic recording layer, the magnetic recording layer comprising a transparent polymeric binder, ferro-magnetic particles and abrasive particles, the magnetic particles having a surface area greater than 30 m.sup.2 /gm and a coverage of from about 1.times.10.sup.-11 mg/.mu.m.sup.3 to about 1.times.10.sup.-10 mg/.mu.m.sup.3, the abrasive particles having a median diameter of from about 0.2 to about 0.4 .mu.m, specific surface area greater than 5 m.sup.2 /gm, a Mohs hardness of at least 6 and being present in the transparent magnetic layer in an amount of at least about 30% by weight based on the weight of the magnetic particles present.

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