In the workflow
Why 1-bit bitmap matters
In a prepared photo workflow, the black and white pixels form the final mark pattern. Resizing or dithering this file again can damage that pattern.
Practical check
How to evaluate it
Inspect the exported image at 100% zoom and confirm that its final pixels are only black or white. If the dimensions change, regenerate the dither from the continuous-tone source instead of scaling this bitmap.
Go deeper
Dithering for Laser Engraving: A Practical Guide
Understand how one-bit dithering represents photo tones, how common algorithms differ, and how to choose without processing the image twice.
Read the complete guide