DTG printing on white fabric is straightforward. DTG on black, navy, or other dark garments takes more skill. Colour accuracy, opacity, and pre-treatment all matter. Here is what we have learned after thousands of dark-garment DTG prints.
The white underbase: non-negotiable
Dark DTG requires a white ink layer printed first, underneath the colour design. Without it, your yellow, red, or pink colour prints muted and dull, because the dark fabric shows through.
The underbase:
- Matches the exact shape of your design
- Uses more ink than the colour layer above
- Must be cured (dried) before colour ink is printed on top
Modern DTG machines print both white and colour in one pass, so this happens automatically. But the white ink is why dark DTG costs more per unit than white DTG.
Pre-treatment fluid
Cotton needs a pre-treatment fluid sprayed and pressed before the white ink layer. This creates a smooth base for the ink to bond to.
Skipping or short-cutting pre-treatment is the number one reason for bad dark-garment DTG. The print looks fine initially but washes off after 5 to 10 cycles.
At our shop we pre-treat every dark garment manually and test before production. If you are comparing quotes from different printers, ask whether pre-treatment is included.
Myth: DTG on black is as vibrant as on white
Not quite. Even with a perfect white underbase, there is a slight haze to DTG colours on dark fabrics that you do not see on white. Bright yellows look slightly desaturated. Pastels suffer most.
If perfect vibrancy on black matters (photography, portfolio piece, launch), DTF printing is a better choice. DTF sits on top of the fabric and does not rely on the underbase in the same way.
Myth: all fabrics dark-print equally
They do not. Cotton varieties behave differently:
- Ringspun 100% cotton: best results
- Heavy cotton (Gildan 5000): reliable
- Slub cotton: slightly rough surface, can affect edges
- Cotton/poly blend 50/50: pre-treatment works less well
- Tri-blend (cotton/poly/rayon): DTG is a poor match
For blends, use DTF or vinyl.
Garment colour behaviour
Rough guide to how different garment colours affect DTG:
| Garment colour | Result |
|---|---|
| White | Sharpest, fullest colour range |
| Light grey, pastel | Very good, minimal underbase needed |
| Medium colours (navy, green, burgundy) | Good with full underbase |
| Black, charcoal | Good with full underbase, slightly softer feel |
| Red, royal blue, deep colours | Tricky: some colours of your design may need adjustment |
Feel difference
DTG on white has almost no hand-feel; the ink vanishes into the cotton. DTG on black with a full underbase has a slight plastic feel where the underbase sits. Less noticeable after a few washes.
Common issues and fixes
Ghosting: a faint outline appears around the print after washing.
- Cause: underbase did not cure fully
- Fix: longer cure time, proper heat press
Cracking: print cracks on stretching.
- Cause: too much ink, or wrong cure
- Fix: reduce ink volume, increase cure temperature slightly
Washing out: colour fades after 5 to 10 washes.
- Cause: no or inadequate pre-treatment
- Fix: proper pre-treatment before white underbase
Dull colours: colours look muted.
- Cause: underbase too thin
- Fix: increase underbase ink density
When to pick DTG vs DTF for dark garments
Quick rules:
- Soft cotton fashion tee, dark colour, photograph or detailed artwork: DTG
- Polyester or blend, dark colour: DTF
- Ultra-vivid pastels on black: DTF (colour accuracy wins)
- Streetwear brand, premium feel matters: DTG with good pre-treatment
- Workwear, heavy use: DTF
Ordering dark-garment DTG
Give us:
- Artwork (vector preferred, or 300dpi PNG with transparent background)
- Garment details (brand, colour, fabric composition)
- Quantity and size breakdown
- Print position and size
We prepare a sample on the exact garment (£10 sample fee, refundable on order over 20 units) so you see the real result before committing.
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