ARTJET UV flatbed (separate varnish LED lamp) / Substrate needing glossy UV varnish finish (minimize banding)

Substrate needing glossy UV varnish finish (minimize banding) on ARTJET UV flatbed (separate varnish LED lamp)

guide

Layer order

Color (or existing print) → Varnish

White layers

0 or as designed

CMYK layers

as designed

Varnish

Density ~40% optimal in lamp-position-1 test (banding minimized at 30–60%; worse outside); dedicated varnish lamp position 1 preferred over 2/3

Print mode

Dedicated varnish LED lamp (not curing every 4th carriage pass with main lamp)

Durability

Lamp position 3 = faster cure/matte less gloss; position 1 = more spread/gloss with least banding in test

Notes

Author tested varnish density 10–100% in 10% steps at lamp position 1; 40% minimized banding while keeping glossy/greasy look. Older 4-print-1-cure software method caused banding.

Source: ARTJET

Summarized from the linked source. Test on scrap before production runs.