Delrin is used to produce embossing presses. Embossing presses are used by notaries, companies, engineers and government agencies to add relief embossing, as well as a signature to protect quality documents from being copied fraudulently. Elegant embossing also adds a personal touch to stationery and invitations.
Consider three tips for achieving quality engraving results on this material:
- Engraving depth: The engraving depth should be at least 0.25 mm with a maximum depth of 0.5 mm. Values smaller than the minimum depth lead to weak or illegible imprints, while values exceeding the maximum depth may tear the paper at certain points. Minimum and maximum depths can be set indirectly via laser parameters.
- Defocusing: One of the problems with seal presses may be that the press cuts through the paper. To solve this, set the laser to be out of focus by around 2 mm (= z-axis offset by 2 mm). Embossing results will remain the same; however, the seal’s edges will become more rounded, resulting in a gentler process for the paper.
- Text size: Text or graphic elements should be at least 0.5 mm in size or no less than a 5-point font. When using paper grades that are significantly heavier than 80 g/m2, the size of the graphic elements should also be increased.
-Josh Stephens, Trotec Laser