Safety label or adhesive tape with evidence of tampering

A tamper-evident adhesive security tape or label comprising:

• a flexible backing substrate based on a flexible polymeric film, wherein one surface of the flexible backing substrate bears the following applied layers:
• a) an embossed varnish layer,
• b) a semitransparent metal layer and/or a high refractive index layer,
• c) a partial release varnish layer in a form of letters, signs, symbols, lines, guilloches, numbers or writing,
• d) one or more varnish layers having optical properties,
• e) a full-area release varnish layer,
• f) a full-area varnish layer, and
• g) a self-adhesive coating layer,
• wherein, in regions that are not coated with the partial release varnish layer:
• an adhesion of the embossed varnish layer, the semitransparent metal layer and/or the high refractive index layer, the one or more varnish layers having optical properties, the full-area release varnish layer, the full-area varnish layer, the self-adhesive coating layer, and an article to be secured to one another is greater than an adhesion of the one or more varnish layers having optical properties to the full-area release varnish layer, or the adhesion of the embossed varnish layer, the semitransparent metal layer and/or the high refractive index layer, the one or more varnish layers having optical properties, the full-area release varnish layer, the full-area varnish layer, the self-adhesive coating layer, and the article to be secured to one another is greater than an adhesion of the full-area release varnish layer to the full-area varnish layer;
• and
• wherein, in regions that are coated with the partial release varnish layer:
• an adhesion of the embossed varnish layer, the semitransparent metal layer and/or the high refractive index layer, the partial release varnish layer, the one or more varnish layers having optical properties, the full-area release varnish layer, the full-area varnish layer, the self-adhesive coating layer, and the article to be secured to one another is greater than an adhesion of the semitransparent metal layer and/or the high refractive index layer to the partial release varnish layer, or the adhesion of the embossed varnish layer, the semitransparent metal layer and/or the high refractive index layer, the partial release varnish layer, the one or more varnish layers having optical properties, the full-area release varnish layer, the full-area varnish layer, the self-adhesive coating layer, and the article to be secured to one another is greater than an adhesion of the partial release varnish layer to the one or more varnish layers having optical properties;
• and
• the adhesion of the semitransparent metal layer and/or the high refractive index layer to the partial release varnish layer is lower than the adhesion of the one or more varnish layers having optical properties to the full-area release varnish layer and the adhesion of the full-area release varnish layer to the full-area varnish layer, or the adhesion of the partial release varnish layer to the one or more varnish layers having optical properties is lower than the adhesion of the one or more varnish layers having optical properties to the full-area release varnish layer and the adhesion of the full-area release varnish layer to the full-area varnish layer.