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SpiraLok™ is the most broadly effective weapon against scanning and colour photocopting in our anti-copy arsenal.

Image data is captured as pulses of linewidth mapped to a single spiral line. This line is a contiguous spiral, like the groove of a record, growing at a rate engineered to induce moiré (cause interference patterns to appear) in any copy or scan.

SpiraLok™ screens are best used in one colour applications because of their propensity to moiré when combined with any other screen.

© 1996-2007 HCC Security Graphics

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