Division 3 PAPER AND SECURITY PRINTING FEATURES TO PREVENT FORGERY
United Kingdom
To prevent forgery, the certificate of conformity shall be protected by coloured graphics and at least one of the following:
- (a)
a watermark in the form of the registered mark of the manufacturer;
- (b)
another security printing feature (e.g. ultraviolet fluorescent ink, inks with viewing angle-dependent colour, inks with temperature-dependent colour, micro printing, guilloche printing, iridescent printing, laser engraving, custom holograms, variable laser images, optical variable images, physically embossed or engraved manufacturer’s logo, etc.).