They were once described as unforgeable, but these days Australia's polymer notes are under attack. Counterfeiters are using cheap printing technology to make notes so good they can fool thebanks and courts.

This year marks 30 years since the introduction of the first polymer bill. And in those three decades Australia has enjoyed low and falling forgery rates.

But recently the forgers have been clawing back those gains and today Australia is one of only four countries where counterfeiting rates are increasing.

Roland DG's commercial-grade printers are the workhorses of the printing business. By the standards of the industry they are considered affordable and powerful. For about $70,000 you can buy amachine capable of printing virtually any colour on any substrate, including clear film.

Thirty years ago when the first Australian polymer bank note was introduced, the idea they could be faked with off-the-shelf printers and materials was unthinkable.

To read the complete article, see:
'Unforgeable' Australian bank notes under attack fromcounterfeiters (http://www.smh.com.au/national/unforgeable-australian-bank-notes-under-attack-from-counterfeiters-20180202-h0sgm8.html)