DTF Glossary
Alpha threshold
An alpha threshold is the cutoff that separates pixels included in an opacity-derived mask from pixels excluded from it. On an 8-bit alpha scale, changing the cutoff decides whether faint edge or background pixels become white, varnish, visible content, or nothing. It does not repair the underlying colour artwork.
In practice
A low threshold preserves more soft content but can admit haze or removal residue. A high threshold rejects more faint pixels but can cut into antialiasing, shadows, distress, or smoke. The correct value depends on the approved art and the mask’s purpose.
NestSheet’s production profile derives white from artwork alpha using its fixed threshold. The operator-facing White control selects a sheet-wide choke of 0, 1 or 2 px. Inspect artwork coverage on the canvas and the final W1 separation in the exported file.