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Light-sensitive vesicular imaging materials
T990001 Light-sensitive vesicular imaging materials
Patent Drawings:Drawing: T990001-2    
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(1 images)

Inventor: Huffey, et al.
Date Issued: January 1, 1980
Application: 06/037,513
Filed: May 9, 1979
Inventors: Huffey; Roy F. (Ipswich, GB2)
Lothian; David E. (Colchester, GB2)
Rennison; Stuart C. (Hadleigh, GB2)
Titman; Michael K. (Colchester, GB2)
Assignee: Bedford Limited (London, GB2)
Primary Examiner:
Assistant Examiner:
Attorney Or Agent:
U.S. Class: 430/152; 430/162; 430/273.1; 430/290; 430/292
Field Of Search:
International Class: G03C 5/60
U.S Patent Documents:
Foreign Patent Documents:
Other References:









Abstract: Light-sensitive vesicular imaging materials, suitable for the production of colored labels, etc., comprise a light-sensitive vesicular imaging layer applied to one surface of a transparent self-supporting plastics sheet or film such as a linear polyester, e.g. polyethylene terephthalate film, said light-sensitive vesicular imaging layer comprising a polymeric vehicle having uniformly dispersed therein a sensitizing agent which releases a vesicle-forming gas, preferably nitrogen, upon exposure to light and optionally including a pigment or dye, said polymeric vehicle comprising a thermoplastic polymer having a nitrogen permeability constant in the range 1.times.10.sup.-15 to 1.times.10.sup.-10 and being softenable upon heating above ambient temperature to permit the gas released by the sensitizing agent in the light-struck areas to form an image in the form of light-scattering or reflecting vesicles therein, wherein at least one pigmented or dyed coating layer which includes a polymeric binder and has an opacity represented by a total luminous transmittance measured by ASTM test method D-1003-61 not exceeding 25% is applied over the vesicular imaging layer and remote from the plastics sheet or film and provides a contrasting background for the image. The pigmented or dyed layer may optionally contain a self-adhesive or pressure-sensitive adhesive for affixing the material to a receptive substrate. Alternatively a separate self-adhesive or pressure-sensitive adhesive layer may be applied to the pigmented or dyed layer, optionally protected by a peelable backing layer.
Claim:
Description:
 
 
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