The rather battered library card on the bottom has been rattling around on Mary’s keyring since late in the last millennium:
I made the one on the top as a replacement, because Mary wanted one, but the library no longer issues keyring cards these days.
The front surface was laid out in The GIMP, inkjet-printed on good paper, cold laminated, laser-cut with LightBurn’s Print-and-Cut process, then affixed to the acrylic tag with really good double-sided tape:
I cut and applied the tape after cutting the tag, but the next time around I’ll apply the tape to the stock and cut both together to improve the edge alignment.
The rear surface data is engraved directly into the same Trolase laminated acrylic I used for the plant tags:
The smaller text uses dot mode and the bars & number are engraved:
In retrospect, it’s painfully obvious the engraving passes should run parallel to the bars, rather than perpendicular to them.
The barcode uses Codabar encoding generated with a Codabar font. I scaled the graphic block slightly larger than the original in the hope of making it more readable.
I determined the start and stop characters by trial and error; for this card, they’re A and B. Which could, perhaps, stand for Arlington Branch, but might equally well be coincidence.
It worked perfectly on the first scan at the library counter and apparently went entirely unnoticed. I trust duplicating a library card does not constitute a federal offense.
For what should be obvious reasons, however, I’m not posting the LightBurn layout.
The Smell of Molten Projects in the Morning 
