摘要:
An anti-copying film or layer is composed of a film or layer of transparent material with a plurality of mutually spaced, at least partially non-transparent areas whose planes are arranged in approximately the same position with respect to the surface of the film or layer, so that from a predetermined viewing angle the surface of the anti-copying film is substantially transparent. These areas are at least partially made of a photosensitive material converted by exposure to radiation into a non-transparent or reflecting material. Grooves or flutes in which the photosensitive material is located may also be provided in the transparent plastic material.
摘要:
In order to improve contrast in diazofilms, the diazo compounds in the light-sensitive layer which are to be activated by exposure for colour formation are supplemented by diazo compounds in the case of which nitrogen remaining at the exposed locations and bubbles causing light scatter are produced after the action of light followed immediately by a heat treatment.
摘要:
An anti-copying film or layer is composed of a film or layer of transparent material with a plurality of mutually spaced, at least partially non-transparent areas whose planes are arranged in approximately the same position with respect to the surface of the film or layer, so that from a predetermined viewing angle the surface of the anti-copying film is substantially transparent. These areas are at least partially made of a photosensitive material converted by exposure to radiation into a non-transparent or reflecting material. Grooves or flutes in which the photosensitive material is located may also be provided in the transparent plastic material.
摘要:
An anti-copy film or coating for originals or documents consists of transparent film material with a plurality of spaced, at least partly opaque and possibly reflective regions arranged as coverings on the foil surfaces substantially staggered in the horizontal plane and especially mutually parallel, so that the information on an original beneath them is hidden when viewed vertically and visible when viewed from a predetermined angle. Suitable production methods permit the use of photographic methods.
摘要:
An anti-copy film or coating for originals or documents consists of transparent film material with a plurality of spaced, at least partly opaque and possibly reflective regions arranged as coverings on the foil surfaces substantially staggered in the horizontal plane and especially mutually parallel, so that the information on an original beneath them is hidden when viewed vertically and visible when viewed from a predetermined angle. Suitable production methods permit the use of photographic methods.