US 5,434,119 A · Transparent recording medium

Abstract

A transparent recording medium is disclosed which can directly record a fine, precise image. With the recording medium, a compact, fine image occupying a small storage space can be easily enlarged and confirmed by an enlarged projection. It is prepared by applying a coating liquid for recording comprising a developer in which a hydroxyl group with a developing function is blocked by an N-substituted carbamoyl group or an O-substituted oxycarbonyl group, an iron salt of an organic acid or a leuco dye, a near-infrared absorbing agent, and a binder, uniformly dissolved in an organic solvent such as MEK, to a transparent plastic substrate, and drying to obtain a transparent recording layer with a thickness of 3 .mu.m to 8 .mu.m. A visible, precise, fine direct image can then be recorded using a semiconductor laser beam.

Claims20

Dependent claims

A transparent recording medium comprising a transparent supporting medium and a transparent recording layer formed on said transparent supporting medium, wherein said transparent recording layer comprises:

a developer formed by blocking at least one hydroxyl group with a developing function by an O-substituted oxycarbonyl group, --C(.dbd.O)--O--R.sub.2, which developer is represented by the following formula (1),
R--(OR.sub.A).sub.m (OH).sub.n-m ( 1)
wherein R is a substituted or unsubstituted aryl group, R.sub.A is the group ##STR8## wherein R.sub.2 represents a substituted or unsubstituted alkyl group, cycloalkyl group, vinyl group, allyl group, aryl group, benzyl group, naphthyl group, mesyl group, or tosyl group, R.sub.2 may be the same or different when n is at least 2;
n and m are integers of 1-3, provided that m.ltoreq.n.

1 more element

Dependencies are inferred from the claim text.

Transparent recording medium

Life of this patent

Transparent recording medium

Life of this patent

Abstract

Claims20