Tool help
Color Separation
CMYK halftoned plates ready for screen burning, or spot layers — exported as ZIP of PNGs.
Best for
CMYK process screen printing — burn one screen per plate, register, and print.
Simple steps
- Pick CMYK mode (default).
- Keep ‘Halftone plates’ on so each plate prints as dots.
- Set LPI to match your mesh and output DPI to match your film printer.
- Apply, download the ZIP, burn one screen per file (C, M, Y, K).
What each setting means
Mode
CMYK = four process plates. Spot = merge to N flat spot masks.
Halftone plates
On = print-ready halftone dots per plate. Off = continuous-tone density.
LPI
Halftone screen frequency. Match it to mesh count / desired dot size.
Output resolution (DPI)
Pixels per inch of the film output. Higher = crisper dots.
Min dot %
Drops dots smaller than this to avoid unprintable specks.
White threshold
Snaps near-white to paper white before separating.
Alpha threshold
Pixels below this are treated as clear (paper white).
Black on white
On = more ink renders darker on the plate (typical film positive).
Number of separations
Spot mode only — target number of spot channels.
Helpful tips
- Standard CMYK angles are used: C=15°, M=75°, Y=0°, K=45°.
- Register the four screens carefully — even small offset shows in 4-color print.
- Tune LPI/min dot to your mesh; very high LPI clogs on coarse mesh.
- CMYK here is a device CMYK formula, not a press ICC profile.