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Sublimation on glass works only on glass with a sublimation coating. Plain glass has nothing for the dye to bond with, so the design washes off or never transfers. Buy pre-coated sublimation glass blanks, such as glass cans, cutting boards, photo panels and ornaments, or coat heat-safe glass yourself with a coating made for glass. Then press at about 400°F at the blank maker's time, and let the glass cool slowly so it doesn't crack.
Below is what to buy, when to mirror, settings for the most common glass blanks, and how to avoid the two classic problems: faint prints and cracked glass.
Why sublimation on glass needs a coating
Sublimation ink turns to gas under heat and bonds with polyester. Glass is non-porous and has no polyester, so the dye has nowhere to go. Sublimation glass blanks carry a clear or frosted polymer coating on one side. That's also why the side you print on matters: the transfer must face the coated surface.
Types of sublimation glass blanks
| Blank | Coated side | Mirror? | Press with | Notes |
|---|---|---|---|---|
| Glass cans and cups (clear or frosted) | Outside | Yes | Tumbler press or oven | Frosted shows color more solidly |
| Glass cutting boards | Textured or marked side, per maker | Per maker | Flat heat press | Thick glass; needs even pressure |
| Glass photo panels and blocks | Usually the back | Usually no, viewed through the glass | Flat press | Check orientation before printing |
| Glass ornaments | Often the back | Often no | Flat press or mini press | Small and fragile |
| Glass you coat yourself | Wherever you spray | Depends on viewing side | Depends on shape | Coating must be cured first |
Clear vs frosted: sublimation ink is transparent and can't print white. On clear glass, designs look like stained glass and white areas stay see-through. Frosted coatings give a more solid, opaque look.
Sublimation glass cans and cups
Glass cans with bamboo lids are among the most popular glass blanks. HTVRONT's 16 oz clear and frosted glass blanks come with a bamboo lid, silicone ring and gift box, and HTVRONT publishes specific settings:
- Print size: 9.65 x 4.73 inches.
- Heat press (tumbler press): 400°F (200°C) for 90 seconds.
- Oven: 400°F for 8 minutes.
- Shrink wrap: HTVRONT warns not to let it touch the glass.
- In use, HTVRONT rates the glass from -4°F to 248°F (-20°C to 120°C).
How to sublimate a glass can
- Print the design mirrored at the blank maker's size (9.65 x 4.73 inches for HTVRONT's 16 oz).
- Clean the glass with a lint-free cloth and let it dry.
- Wrap tightly with the print facing the glass, and tape the seam and both edges with heat-resistant tape.
- Fit the right press mat, if your press uses one. HTVRONT's A200 uses a 4.0 mm mat for 16 oz glass.
- Press or bake at the maker's setting.
- Remove with gloves, peel the paper while warm, and let the glass cool on a heat-safe surface.
Tumbler presses with glass settings make this easier. VEVOR's TL-KD1 has a glass preset and, per VEVOR, can press two glass cups at a time. Our sublimation tumblers guide compares presses, and the full wrap technique is in our guide to how to sublimate a tumbler.
Sublimation glass cutting boards
Glass cutting boards are thick, flat blanks pressed in a flat heat press. The coated surface is usually the textured or marked side; the maker's instructions say which side to print and whether to mirror. Thick glass holds heat for a long time, so:
- Use even, medium pressure and keep the board centered on the platen, well away from the edges.
- Use fresh butcher paper above and below.
- Press at the maker's time and temperature. Settings vary between boards, so test one before a batch.
- Let it cool in the press area or on a heat-safe board, not on a cold countertop.
Glass photo panels and ornaments
Many clear photo panels and ornaments are coated on the back and viewed through the front. Because you look through the glass, the image is already reversed, so you don't mirror the print. Some makers coat the front instead; check before printing a batch. Glass ornaments are small and fragile, so handle them by the edges and let them cool fully before adding ribbon. See our sublimation ornaments guide for ornament blanks and settings, and our sublimation on acrylic guide for a lighter clear alternative.
Coating your own glass
If you want to decorate glass that isn't sold as a sublimation blank, a sublimation coating made for glass can work, on glass made to handle the heat. Subli Glaze, for example, is sold for glass along with metal, ceramic, wood and stone; its directions, as published by JP Plus, are to spray a clean, dry, grease-free surface in light passes from about 12 inches, air-dry 10 minutes, then cure at 320°F (160°C) for 15–20 minutes in a convection oven dedicated to sublimation. Our sublimation coating spray guide covers the process step by step.
Design tips for glass
Glass changes how a design reads, so plan for it before you print.
- Design for transparency on clear glass. Areas that would be white on paper stay see-through, and light pastels almost disappear. Bold, saturated colors and dark line art read best.
- Use frosted glass for photos. The frosted coating gives the image a solid background, so faces and skin tones look natural rather than ghostly.
- Think about what's behind it. A clear can filled with a dark drink changes how the design looks, and a clear panel against a white wall looks different from one in a window. Show customers both if you sell clear glass.
- Keep text away from the seam on cans, and leave the rim and base clear where the coating may stop.
- Add a white backing for clear panels if you want a print that looks the same anywhere; a white card or stand behind the glass does the job.
- Test one piece per design style. Glass blanks cost more than paper, but less than a failed batch.
Glass settings at a glance
| Glass blank | Temperature | Time | Source |
|---|---|---|---|
| HTVRONT 16 oz glass can, heat press | 400°F (200°C) | 90 sec | HTVRONT listing |
| HTVRONT 16 oz glass can, oven | 400°F (200°C) | 8 min | HTVRONT listing |
| Glass cutting boards, panels, ornaments | Per maker | Per maker | Blank maker's instructions |
| Coating cure (Subli Glaze) | 320°F (160°C) | 15–20 min | Subli Glaze directions via JP Plus |
For other blanks, see our sublimation temperature chart.
Avoiding cracked glass
Glass cracks when one part heats or cools much faster than another. To reduce the risk:
- Inspect every blank for chips and cracks before pressing; a flaw becomes a break under heat.
- Use only blanks sold for sublimation, or glass made to handle the heat.
- Cool gradually. Set hot glass on a heat-safe surface away from drafts. Never put it on a cold counter, in the fridge or under water.
- Use even pressure. Over-tight clamps or uneven platens stress the glass.
- Wear heat-resistant gloves and handle glass by the edges.
Common mistakes
- Pressing plain glass. It needs a sublimation coating.
- Printing on the wrong side or mirroring when the design is viewed through the glass.
- Expecting white on clear glass. Sublimation has no white ink; use frosted glass or design around it.
- Letting shrink wrap touch the glass, which HTVRONT warns against.
- Cooling too fast, which risks cracks.
More blanks for gifts are in our sublimation blanks guide.
FAQ
Can you sublimate on regular glass?
Not on plain, uncoated glass. Sublimation dye needs a polyester-type coating to bond with, and glass has none. Use sublimation glass blanks that come pre-coated, or apply a sublimation coating made for glass and cure it as directed, on glass made to handle the heat.
Do you mirror sublimation on glass?
It depends on which side the coating is on. On glass cans and cups coated on the outside, mirror as usual. On clear blanks that are coated on the back and viewed through the glass, such as many glass ornaments and photo panels, the glass itself reverses the image, so you don't mirror. Follow the blank maker's instructions.
What temperature do you sublimate glass at?
Around 400°F (204°C), but times vary by blank. HTVRONT gives its 16 oz glass cans 400°F for 90 seconds in a heat press or 8 minutes in an oven. Glass cutting boards and panels have their own settings, so follow the blank maker's numbers.
Why did my sublimation glass crack?
Usually a sudden temperature change, a chip or flaw in the glass, or uneven pressure. Let hot glass cool on a heat-safe surface away from drafts, never put it on a cold counter or in water, and inspect blanks for chips before pressing.
Can you use shrink wrap on glass tumblers?
HTVRONT warns not to let shrink wrap touch its glass blanks. Wrap and tape the paper tightly, and if you use a sleeve in an oven, follow the blank maker's directions so the plastic doesn't stick to the glass.