| 摘要 |
FIELD: safety.SUBSTANCE: invention relates to color changing protective element equipped with additionally recognisable in passing light recesses, method of its production and use. Protective element coated with color changing material having optically variable effect and recognisable in passing light recesses, protective element comprises a carrier substrate and partial layer with recesses, partial layer is made from opaque coating which has light absorbing properties on the side facing to the color changing coating, and on the side opposite to color changing coating this material has metal colour, partial opaque coating consists of a light-absorbing metal layer and reflecting metal layer.EFFECT: technical effect consists in creation of protective element with optically variable effect, preferably effect of color change; protective element allows optimally recognise optical effect which is hidden on rear side when viewed in reflected light through a sheet of paper.16 cl, 5 dwg |
