Physical and chemical protection of printed products
To increase the security and compatibility of Goznak’s products, the specialists of the Research Institute have developed and put to production chemical authenticity security elements, including those with machine-readable properties. An element of physical and chemical security combining chemical and thermochromic properties is used particularly widely now.
The specialists of Goznak have developed a number of chemical security elements protecting against various kinds of extermination; their embedding into paper or products provides reliable security of the applied information. At the attempt to change (exterminate) an inscription, a peculiar colour spot appears in the area of extermination; the colouring does not disappear in time. It is already impossible to use such a spoiled document. A few security anti-extermination agents may be applied to the paper; it provides complex security of the final products. Various sets of security agents against extermination are implemented into a large assortment of Goznak’s products: passports of the citizens of the Russian Federation; promissory notes of Sberbank of Russia; certificates of higher professional education; forms for population census; work record books; visa forms etc.
|Sodium Hydroxide 5%||White-spirit|
|Sulphuric Acid 5%||Alcohol|
|Sodium Hypochloride||Butyl Acetate|
Paper protected against chemical extermination