Process for forming images using body with reversible fixable an

Details Process for forming images using body with reversible fixable an Process for forming images using body with reversible fixable an

1982-09-28

1987-09-22

Bowers, Jr., Charles L.

Radiation imagery chemistry: process, composition, or product th

Imaging affecting physical property of radiation sensitive...

Light scattering or refractive index image formation

430 19, 430 31, 430 50, 430152, 430269, 430346, 430347, 430348, 430945, 2503171, G03C 500

Patent

active

046955283

ABSTRACT:
In order to be able, in a simple manner, to erase, by heating, data recorded on bodies with reversible, temperature-variable light extinctions, and then to be able to use the body anew for the recording of data, these bodies consists of at least one polymer material and/or resin matrix material (A) and at least one organic low-molecular substance (B), which is insoluble, at least partially, in the latter and which is contained therein as a dispersed second phase, whereby the pair of materials (A/B) possess variable light extinctions below a specific temperature (T.sub.0) in dependence on a previous heating above T.sub.0 and are so constituted that, upon being heated above a conversion temperature (T.sub.2) which lies above T.sub.0, and being cooled off subsequently to below T.sub.0, yields maximum light extinction; and, upon being heated in the state of maximum light extinction to a temperature (T.sub.1) which lies above T.sub.0 and below T.sub.2, and subsequent cooling off to below T.sub.0, yields light extinctions which become smaller with increasing temperature; and, upon being heated to a temperature between T.sub.1 and T.sub. 2 and subsequent cooling off to below T.sub.0, yields minimum light extinctions.
Such bodies--in film form or in the form of coatings, for example--can be employed as erasable microfilms and other erasable record carriers.

REFERENCES:
patent: 3180752 (1965-04-01), Bollinger et al.
patent: 3342618 (1967-09-01), Peticolas
patent: 3501297 (1970-03-01), Cremeans
patent: 3607273 (1971-09-01), Kinney
patent: 4268413 (1981-05-01), Dabisch

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