- Set the total ink limit to 250–280 % for converted Epsons
- Set GCR (black generation) to 60–80 % so dark colours use black, not CMY on top of each other
- Lower per-channel limits (C/M 80 %, Y/K 70 %) if the film still puddles
Total ink limit (TIL)
A dark brown is cyan + magenta + yellow + black. Without a limit that pixel gets up to 400 % ink coverage plus 100 % white underneath — five layers of wet ink that never fully dry before the powder. The TIL caps the sum. On DTF film 250–280 % is the range; ZoroPrint defaults to 280.
GCR / black generation
Grey component replacement swaps the part of a colour that is “grey” (equal C, M and Y) for black ink. Higher GCR means less total ink for the same colour, sharper dark detail and a thinner film. 60 % is a safe default; 80 % for designs with a lot of dark shading.
Per-channel limits
Each ink has a point where more drops do not make the colour darker, they only make it wetter. The BlackBox-style defaults (C 80, M 80, Y 70, K 70 %) come from that point on typical DTF inks. If a solid colour looks puddled or bleeds into its neighbour, lower that channel by 10 %.
Symptoms → settings
- Cracks along dark areas after washing: TIL too high → 250 %.
- Transfer feels like a rubber patch: TIL and white density both high → 260 % and 80 % white.
- Dark colours look glossy and smear on the film: per-channel limits → −10 %.
- Dark colours look flat and greyish: GCR too high → 40–50 %.
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