UV printing on slate

Coasters, house number signs, plaques. What the printer and primer makers publish about slate: primer, white ink, flat or rotary, how long prints last and what goes wrong.

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Desktop UV: With prep
Primer: Helps
White ink: On dark or clear
Shape: Flat bed

Glass, ceramic and stone. Things people make: coasters, house number signs, plaques. From the sources at the end, checked October 11, 2026; we haven't tested it ourselves.

What it needs

Desktop UV printers: With prep Roland calls slate well suited to UV printing but says its porous, uneven surface may need pretreatment. [1] [4]
Primer or adhesion promoter: Helps. Roland: print a layer of clear gloss as a base coat to close the pores in slate. One Roland customer adds "a very sticky base white" before printing (no product named). [1] [2]
White ink: On dark or clear. xTool rock coaster example: the coaster is dark, so use at least two white layers. [3]
Flat or curved: Flat bed. Printed flat on the bed. xTool places a rock coaster on its adhesive mat. [3]

How long it lasts

Outdoors: One Roland customer (VersaUV LEF-300) reports a slate print left in the sun for a year and a half still looked good. This is one shop's account, not a test. [2]
Scratches and wear: Same customer: very hard to scratch off 24 hours after printing, no complaints. [2]

What goes wrong

Porous, uneven surfaces can give poor adhesion without pretreatment.
Dye-sublimation worked indoors but not well for outdoor slate plaques (customer account).

[1] [2]

Before you print

Wash and dry the slate before printing.
Keep the surface clean, dry and free of oils.

[1] [2]

Supplies

Look for an adhesion promoter sold for UV printing on slate, and read its data sheet for how long to let it dry: adhesion promoter (Amazon US), adhesion promoter (Amazon UK). Clean with isopropyl alcohol wipes first. Test one piece before a batch.

Every material in one table: what a UV printer can print on. Weighing up other machines? See UV against DTF, sublimation and a Cricut.

Has a maker published something different, or does your printer's manual disagree? Email hello@homeuvprinter.com and we'll check it against the source.

Sources

Checked October 11, 2026.