The invention relates to the technical field of photoetching anti-counterfeiting, in particular to a photoetching encrypted anti-counterfeiting method, and provides the photoetching encrypted anti-counterfeiting method for miniaturizing characters and patterns on pixel points. The method comprises the following steps of: taking a
glass sheet of which the surface is subjected to uniform gluing as a substrate, and designing a character aperture, namely designing a
single character aperture design sheet of miniaturized characters by using a computer; preparing a film; turning the film, namely exposing, developing and slitting the film so as to obtain a
single character aperture sheet; designing an original drawing according to the resolution and character space; introducing the original drawing into a photoetching
machine computer on a photoetching
machine, substituting original common
metal apertures, such as a
nickel hole with only aperture function for the
single character aperture sheet, and exposing a
photoresist dot matrix; developing by using developing solution; and
electroforming, namely injecting silver and reprinting to obtain a mother set. By adopting the method for increasing characters and patterns in photoetching pixel points, the characters and patterns can be observed by a high power magnifier only, while human
visual inspection is substantially consistent with common photoetching. Therefore, the anti-counterfeiting capability of holographic identifiers is improved, and the plate-making technical effect is enriched.