Every roll of original IWAN SIMONIS cloth has 3 different markings which guarantee the authenticity of the product:
Next to the selvedge/side of the cloth there is alternatively every approx. 60 cm :
1. the IWAN SIMONIS well known signature logo
2. the IWAN SIMONIS name in block letters with the product name (860 for instance). These two markings which used to be printed in white colour until August 2007 are since then laser-printed in gold colour.
There is also printed in the middle of the width of every meter of cloth :
3. a mark showing IWAN SIMONIS name in block letters followed by the serial number of the roll (ID number) : this indelibly U.V. marking is only visible in black light (U.V.light).