DNP Achieves Global First with Application of Mechanolminescent Printing

Light emitted as stress applied

Dai Nippon Printing Co., Ltd. (DNP) has developed a mechanoluminescent printing technique, whereby light is emitted from ink by applying stress to a printed surface via such actions as cutting, bending or scratching. The Company is also pleased to announce the achievement of a global first in applying this technology to boost the anti-counterfeiting effect of printed material, such as vouchers. Mass production will commence in October, 2014.

[Development Background]

Anti-counterfeiting printing can be broadly divided into two main techniques; determining authenticity mechanically, or with the naked eye. Anti-counterfeiting that relies not on mechanical methods, but the naked eye, is a technique that can be easily performed anywhere. At the same time, however, it is also prone to copying by malicious third parties, and as a result, there has been on ongoing demand for newer technologies.

DNP has actively developed a variety of anti-counterfeiting printing technology, including ink containing artificial DNA that is extremely difficult to copy, and various holograms. And by combining these technologies and techniques the Company has offered product vouchers, tickets and various cards equipped with an expressed anti-counterfeiting effect. On this occasion, as an example of a new anti-counterfeiting printing technology for determining authenticity with the naked eye, DNP has developed an ink using mechanoluminescent pigment from Sakai Chemical Industry Co., Ltd., with the resultant mechanoluminescent printing application constituting a global first for the Company.

[Overview of Mechanoluminescent Printing]

Mechanoluminescent printing uses a mechanoluminescent body with a special particle structure that emits light when a strain occurs. This form of printing is characterized by the fact that light is emitted only when stress is applied, and the light disappears once the printing material reverts to its original state. The printed material is exposed to light for several minutes, after which it is taken into a dark room where it emits a green colored light if strain is applied, such as cutting, bending or scratching. Also, after exposure to sunlight, or illuminated light, on moving to a dark room a lingering phosphorescent glow can be seen. By deeming printed material that emits mechanoluminescent light or a phosphorescent glow as the genuine product, it is possible to use such printed material in determining authenticity. Such material is equipped with water proofing features, and processing suitability, and the ink is colorless. Processing costs for mechanoluminescent printing are planned to be approximately 10% higher than costs for standard printing on a color unit basis.    

Image of mechanoluminsecent mechanism

[Forward Looking Developments]

DNP will promote both use development and market development, including offering mechanoluminsecent printing as tickets that determine authenticity by light emitted when cutting along a perforation, or bending, and those aiming for an eye catching effect. The Company will also investigate the development of methods for mechanically determination of authenticity using mechanoluminsecence or a phosphorescent glow, and also of determination devices.

* Product prices, specification and service contents mentioned in this news release are current as of the date of publication. They may be changed at any time without notice.