Elaborate designs on the banknotes emerge from three printing methods, dry offset for background design, intaglio for raised design, and letterpress for numbers and signatures. Offset Printing The background design is printed first by dry offset on a specially designed printing press that is able to print high-precision color patterns on both sides of the sheets simultaneously. This makes it possible to produce perfect front and back registered designs or see through designs when viewed against transmitted light, one of efficient techniques to discourage counterfeiting.
Offset Printing Machine Offset - printed Sheet Intaglio Printing This process is used to add the portrait of H.M. the King and other raised prints on the front of the note. The image to be printed is inscribed into the plates. The inscriptions are filled with ink, and excess ink is wiped from the plates. Heavy pressure is applied to transfer the ink from the plates to the pager, leaving the surface slightly raised. This process gives banknotes a tactile feel to the touch, proven to be very effective in counterfeit deterrence. Intaglio Printing Machine Intaglio Plate Intaglio - printed Sheet Letterpress Printing Every printed sheet is carefully inspected. The good sheets are sent to printed serial number and signature by letterpress method, while imperfect or bad sheets are taken out of the system to be duly destroyed. The printing machine also has electronic numbering control to protect from miss - printing the numbering. This type of control helps prevent the repeat of numbering printed on each banknote of the same category. The signatures signed on every banknote are reproductions of the signature of the present Minister of Finance and the Governor ot the Bank of Thailand.
Number Printing Machine Number - printed Sheets
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