Esselte Pendaflex Corporation

Letraset Corporation

John S Thornley

John V Shepherd

Simon L Scrutton

Eric M Sutton

Photosensitive materials for use in the making of dry transfer material are described which comprise two carrier sheets which may be peeled apart and three interlayers. The central interlayer is an image-forming layer e.g. a pigmented polymer with a photocrosslinkable or photopolymerizable layer on one side and an adhesive layer on the other side. A dry transfer is obtained by imagewise exposing through a photographic positive and peeling apart the carrier sheets. Thereafter the material is further irradiated e.g. with UV light, to give a dry transfer material.

Photosensitive materials for use in making dry transfers

A method of making signs is disclosed in which a photographically sensitive material is imagewise exposed and developed. The developed image is so constituted that, under the action of heat and pressure, it may be made to adhere to a surface of a transparent or translucent sheet, e.g. of plastics or glass, to form a sign in which the legend is visible through and protected by the sheet. In order to render the legend more visible, a coating or layer may be applied over the legend which accordingly forms a background to the legend as viewed through the sheet. Production of the legend photographically gives very great flexibility in terms of letter size, spacing and the like and allows the production of 'one off' signs on a rapid and economic basis. A simple hot press may be used to adhere the legend to the sign sheet.

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London, United Kingdom

John S Thornley