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Contemporary pack the technology that prevent bogus to connect see (on)
From;    Author:Stand originally

One, presswork of printing ink prevent bogus

1, the magnetic printing ink that prevent bogus

Magnetic printing ink is mixed by makings of painty, join, inserts additional material composition, uses dye is oxidation iron oxide black (Fe3O4) , ferric oxide palm (γ - Fe2O3) , cobaltic ferric oxide palm (γ - Fe2O3) with oxidation chromium (CrO2) wait for ferromagnetic material. Magnetic printing ink produces magnetism after be handled through magnetic field, its can be recorded and the encode written language with special memory and symbol, make its are had on the decorate that pack stronger with the safer function that prevent bogus.

2, turn over color of meet an emergency to prevent bogus printing ink

(1) heat quick becomes angry printing ink

Be make painty color produces change as a result of the change of temperature, refrigeration hind restores the special type printing ink of customary facial expression. Can divide according to the type that become angry become angry to cannot be gone against dye and but inversion color is painty, heat differently time and heat of speed influence printing ink become angry, if what following formula shows:

But inversion color: T=A BlogV

The T in type (℃ ) spend to become colour temperature; V (℃ / Min) to heat speed; A, B is the printing ink constant of some actual measurement. By can see in formula become angry temperature and heat the relationship that speed figures in couples, heat rate is rapid, become angry temperature is high.

Cannot inversion color: T=a Blogt

The T in type (℃ ) spend to become colour temperature; T is (Min) to heat time; A, B is the printing ink constant of some actual measurement. By can see in formula become angry temperature and heat the direct ratio that time counts in couples concerns, heat time is long, become angry temperature is high.

Cannot inversion lubricious dye has commonly usedly: Salt of the sulfate such as lead, cobaltic, nickel, iron, cadmium, Strontium, zinc, manganese, molybdenum, barium and magnesium, nitric acid, phosphate, chromate, sulfide, oxide, and occasionally dye of Jing of azotic dye, phthalein, fragrant base methane dye, its basically become angry mechanism is dye or dye oneself produce pyrolysis or cause, because be chemical reaction, reason is not reversible. Become angry reversibly the cobaltic salt that dye has the iodide of Ag, Hg, Cu, sth resembling a net to change content or double salt, nickel salt and the compound that 4 amine place forms 6 methylene, its basically become angry mechanism is painty some loses crystallization water, some undertakes brilliant model change, have a plenty of the change that PH is worth, all belong to physical change, it is reversible that its change.

(2) photosensitive becomes angry printing ink
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