Calibration crystal
Tune the files to your laser
Every laser and every batch of glass turns dots into brightness a little differently. Burn one small test card, photograph it, and we measure yours.
1 · Burn the test card
Nine grey patches and four corner dots, about 36 × 36 mm. Burn it standing on a 50 mm cube or a Portrait Block with your usual settings, imported with Keep size.
2 · Photograph it
In a dark room on the LED base, straight at the front, with the whole card in the picture. No flash.
Nothing is uploaded unless you press Send. Tested settings · Burn log