How to Press Sublimation Transfers?
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Outta PHX Blog — How-To Guide for Decorators
How to Press
Sublimation Transfers
A complete step-by-step pressing guide for decorators and apparel brands — covering setup, settings, common mistakes, and how to get consistent results every time.
📍 Outta PHX Print Shop — Phoenix, AZ
⏱ 10 min read
⚡ Key Takeaways
- Press sublimation at 390–400°F for 50–60 seconds at medium pressure — always use a heat press, not an iron
- Pre-press your garment for 10 seconds before applying the transfer to remove moisture and wrinkles
- Use heat tape on all four sides of the transfer — any movement during pressing causes ghosting
- Always place parchment paper inside the garment to prevent ink blowthrough to the back layer
- Hot peel immediately after pressing — don't let it cool before peeling
- Sublimation only works on white or light-colored polyester (minimum 50% poly) and polymer-coated hard goods
📋 Table of Contents
Pressing sublimation transfers looks simple on paper — high heat, peel, done. But anyone who's run production knows how quickly things go wrong. Ghosting, dull colors, blowthrough, uneven pressure — most of these problems come from one or two process steps being slightly off.
This guide is written for decorators and apparel brands who want consistent, professional results every single press. Whether you're just getting started or troubleshooting issues on an existing setup, this covers everything you need to press sublimation correctly.
What You Need Before You Press
Before you load up your heat press, make sure you have everything on hand. Missing one item mid-run wastes time and can ruin a garment.
- Heat press — clamshell or swing-away, properly calibrated
- Sublimation gang sheet transfers — printed at 300 DPI minimum, correct color mode (RGB)
- Compatible garment — white or light-colored, minimum 50% polyester
- Parchment paper — one fresh sheet per garment, placed inside
- Heat tape — to secure the transfer and prevent ghosting
- Lint roller — to remove debris from the pressing surface
- Scissors or rotary cutter — to cut individual designs from the gang sheet
- Heat-resistant gloves — recommended for safe hot peeling
💡 Pro Tip
Calibrate your heat press regularly. Most presses run 10–20°F hotter or cooler than the display shows — especially older machines. Use an infrared thermometer to verify actual platen temperature before running production. A miscalibrated press is responsible for more bad sublimation results than almost anything else.
Garment Requirements
Sublimation is non-negotiable on substrate requirements. Get this wrong and no amount of technique will save the result.
Fabric Content
- 100% polyester — best results, most vibrant and saturated color output
- 65–99% polyester — very good results, minimal color loss
- 50–64% polyester — acceptable results, noticeably lighter and more muted colors
- Below 50% polyester — not recommended, colors will appear significantly washed out
- 100% cotton — will not work at all, ink washes out immediately
Garment Color
- White — ideal, produces the most accurate and vibrant color
- Light gray, light yellow, light pink — acceptable, colors will be tinted by the base
- Dark colors — will not work, sublimation cannot overpower the base color
⚠️ Heads Up
Even a slightly off-white or cream garment will visibly affect your color output — especially on designs with white areas or light pastels. For production work requiring accurate color matching, always use true white 100% polyester.
Press Settings — Apparel
| Setting | Value | Notes |
|---|---|---|
| Temperature | 390–400°F | Verify with infrared thermometer |
| Time | 50–60 seconds | Thicker fabrics may need the full 60 sec |
| Pressure | Medium | Even contact across the full platen |
| Peel | Hot peel — immediate | Peel in one smooth, even motion |
| Parchment inside | Required | New sheet per garment |
| Pre-press | 10 seconds | No transfer — removes moisture and wrinkles |
| Cover sheet | Optional | Some decorators use a top sheet to protect the platen |
⚠️ Heads Up
These are proven starting-point settings for standard polyester apparel. Your specific heat press, garment thickness, and transfer paper may require slight adjustments. Always run a test press on a sample piece before committing to a full production run.
Step-by-Step Pressing Guide — Apparel
01
Set your heat press temperature and allow it to fully preheat
Set to 390–400°F and wait until the press has fully reached operating temperature — not just when the display reads the target. Give it 3–5 minutes after the display hits temp. Use an infrared thermometer to verify actual platen surface temperature before your first press.
02
Cut your designs from the gang sheet
Cut each design from the sublimation gang sheet leaving a small border around the artwork. You don't need to cut precisely to the edge of the design — a small margin is fine and easier to handle. Keep designs face-up until you're ready to press.
03
Place parchment paper inside the garment
Slide a fresh sheet of parchment paper inside the garment between the front and back layers. This prevents ink blowthrough — sublimation ink will pass through the fabric under heat and stain the back layer or the platen if there's nothing blocking it. Use a new sheet for each press.
04
Use a lint roller on the garment surface
Roll over the pressing area to remove any dust, lint, hair, or debris. Even small particles can create visible pressure irregularities in the finished print — showing up as small unprinted spots or texture variations. Takes 10 seconds and is worth it every time.
05
Pre-press the garment for 10 seconds
Place the garment on the platen without the transfer and press for 10 seconds. This removes moisture from the fabric, flattens wrinkles, and pre-heats the substrate. A moist or wrinkled garment produces uneven sublimation results. Don't skip this step — especially in humid environments.
06
Position the transfer face-down on the garment
Place the sublimation transfer printed-side down on the garment in your desired position. The ink is on the side facing the fabric — make sure you have the correct orientation before securing. Visually confirm placement before applying heat tape.
07
Secure all four sides with heat tape
Apply heat tape along all four edges of the transfer. This is non-negotiable. Even a slight shift during pressing or when the press opens creates ghosting — a blurry duplicate image that ruins the print. Don't rely on the transfer staying in place on its own.
08
Press at 390–400°F for 50–60 seconds at medium pressure
Close the heat press and apply medium, even pressure. The press time countdown begins when the platen makes full contact. Don't open the press early. At 50–60 seconds, the ink will have fully sublimated into the polyester fibers.
09
Open the press and verify the transfer hasn't shifted
Before peeling, check that the transfer is still in its original position. If it shifted slightly during pressing, you'll see ghosting when you peel — knowing this immediately lets you assess the damage before it affects your next piece.
10
Hot peel — immediately and evenly
Peel the transfer paper away immediately while it's still hot. Start from one corner and pull in a smooth, steady motion at a low angle. Don't let it cool before peeling — cooling allows the paper to re-adhere slightly and can pull ink back off the garment. Fast, confident, even peel every time.
🖼️ Usage Tip
After peeling, the print may look slightly dull or hazy immediately after pressing — especially on lighter designs. This is normal. Sublimation prints fully develop as they cool over the next 30–60 seconds. Don't re-press based on how the print looks immediately out of the heat press.
Pressing on Hard Goods
Sublimation on mugs, tumblers, coasters, and other polymer-coated hard goods follows the same chemistry but requires different equipment and settings. The substrate manufacturer's guidelines are your primary reference — every hard good is different.
General Hard Goods Guidance
- A standard clamshell or swing-away press cannot press mugs and tumblers — you need a dedicated mug press or tumbler attachment
- Flat hard goods (coasters, tiles, mouse pads, phone cases) can be pressed on a standard platen press
- Verify the product is sublimation-ready — it must have a polymer coating; uncoated hard goods will produce very faint, non-permanent results
- Secure the transfer to the substrate with heat tape before pressing — movement causes ghosting on hard goods just as it does on apparel
- Always consult the manufacturer's recommended time, temperature, and pressure for each specific product
⚠️ Heads Up
Hard goods settings vary significantly by product. A ceramic mug, an aluminum panel, and a sublimation-coated phone case all require different temperatures and press times. Using apparel settings on hard goods can damage the coating or the product. Always follow the manufacturer's spec sheet for the specific substrate you're pressing.
7 Most Common Sublimation Pressing Mistakes
These are the issues we see most often — and all of them are preventable.
1. Skipping Heat Tape
The transfer shifts during pressing or when the press opens. Result: ghosting. Use heat tape on all four edges, every single press.
2. No Pre-Press
Moisture and wrinkles in the garment cause uneven sublimation, patchy color, and poor ink transfer. Always pre-press for 10 seconds first.
3. Wrong Fabric
Pressing on cotton, low-poly blends, or dark garments. Sublimation requires minimum 50% polyester and a white or light base — no exceptions.
4. Miscalibrated Press
The display reads 400°F but the platen is actually 375°F. Under-temp produces dull, undersaturated color. Verify with an infrared thermometer.
5. Cold Peel
Waiting for the transfer to cool before peeling. The paper partially re-adheres to the ink and pulls some of it back off. Peel hot — immediately out of the press.
6. No Parchment Paper Inside
Ink blows through the front layer and stains the inside back, or worse — the platen. Place a fresh parchment sheet inside the garment every press.
7. Low-Resolution Files
Submitting 72 DPI artwork for a transfer that will be pressed at 12 inches wide. Results look pixelated and soft. Always provide 300 DPI minimum.
8. Uneven Pressure
One side of the platen pressing harder than the other, or the press not fully closing. Produces uneven color density across the transfer. Check and adjust pressure settings regularly.
Troubleshooting Bad Results
Dull or Washed-Out Colors
- Temperature too low — verify actual platen temp with infrared thermometer
- Press time too short — increase to 55–60 seconds
- Low polyester content garment — test on 100% poly
- Artwork submitted in CMYK instead of RGB — re-export in RGB
Ghosting (Blurry Duplicate Image)
- Transfer shifted during pressing — secure all four edges with heat tape
- Transfer shifted when press opened — ensure heat tape is holding before closing
- Peeling caused movement — hold the garment flat while peeling
Blotchy or Uneven Color
- Moisture in the garment — pre-press for 10 seconds before applying transfer
- Debris on the pressing surface — lint roll the garment before pressing
- Uneven platen pressure — check press calibration and pressure adjustment
Ink Blowthrough on Back of Garment
- Missing parchment paper inside garment — always place parchment inside before pressing
- Temperature too high — verify platen temp is not exceeding 400°F
Color Looks Different from Screen
- Artwork designed in CMYK — convert to RGB before submitting
- Garment is not true white — even slight off-white tints affect final color
- Polyester content below 100% — cotton content dilutes color saturation
💡 Pro Tip
Always run a test press on a scrap or sample piece of the same garment before committing to a full production run — especially when switching to a new garment style, new press, or new transfer supplier. The 2 minutes a test press takes will save you an entire order if something is off.
Pre-Press Checklist
✅ Before Every Production Run
- Heat press fully preheated to 390–400°F — verified with infrared thermometer
- Garment is white or light-colored polyester (minimum 50% poly)
- Fresh parchment paper placed inside the garment
- Garment lint-rolled — debris removed from pressing surface
- Garment pre-pressed for 10 seconds — moisture and wrinkles removed
- Transfer cut from gang sheet and positioned face-down correctly
- Heat tape applied to all four sides of the transfer
- Press time set to 50–60 seconds at medium pressure
- Heat-resistant gloves on for hot peel
- Test press completed on sample garment before production run
Tips for High-Volume Production
Running sublimation at scale requires a production rhythm that minimizes errors and maximizes throughput. Here's what experienced decorators do differently:
- Batch your pre-pressing. Pre-press an entire stack of garments before you start applying transfers — don't pre-press and transfer one at a time. It's faster and keeps your workflow moving.
- Keep parchment sheets pre-cut. Cut a stack of parchment sheets to size before the run starts. Fumbling with parchment rolls mid-production slows everything down.
- Use a consistent placement system. Use a placement ruler, heat press pillow, or alignment marks on your platen to ensure every transfer lands in the same position across an order.
- Check platen temp every 30–40 presses. Heat presses can drift in temperature during long runs. A quick infrared check catches calibration drift before it affects an entire batch.
- Label your gang sheets. When running multiple designs, label each cut transfer on the back with a marker before cutting. Mixing up designs mid-run is an easy mistake on busy production days.
- Let finished pieces cool flat. Stack finished garments on a flat surface to cool — don't bunch them. Sublimation prints are technically still developing in the first 30–60 seconds after pressing.
💰 Value Tip
Gang sheets are the most efficient way to run sublimation at volume. Pack all your designs for a production run onto one or two large sheets — you cut apart and press each design individually, but you save significantly on per-design cost compared to ordering individual transfers. At Outta PHX we offer sheet sizes from 22×12 up to 22×120 inches — and you only pay for the area your designs occupy.
Order Sublimation Transfers from Outta PHX in Phoenix
We print custom sublimation gang sheets for decorators and apparel brands throughout the Phoenix Valley — and ship nationwide. Whether you're running a small batch of jerseys or a large production order, we produce consistent, professionally calibrated sublimation transfers that press cleanly every time.
- Same-day shipping for most orders submitted before 2–3 PM
- 10 sheet sizes — 22×12 to 22×120 inches
- Pay only for what you print — no charge for blank space
- No minimums — one sheet or one hundred
- Local pickup at 420 E Bell Rd, Suite #7, Phoenix, AZ 85022
- Phone: 602-702-3480
We serve decorators in Phoenix, Scottsdale, Tempe, Glendale, Peoria, Chandler, Mesa, Gilbert, Surprise, Goodyear, and ship to all 50 states.
❓ Frequently Asked Questions
What temperature do you press sublimation transfers?
Press sublimation transfers at 390–400°F for polyester apparel. Always verify your actual platen temperature with an infrared thermometer — heat press displays often read 10–20°F off from the true surface temperature. Under-temperature pressing produces dull, washed-out results.
How long do you press sublimation transfers?
50–60 seconds at medium pressure for standard polyester apparel. Thicker fabrics and garments with higher mass may need the full 60 seconds. Never press for less than 50 seconds — under-pressing leaves ink partially in the transfer paper and produces light, incomplete results.
Do you hot peel or cold peel sublimation transfers?
Hot peel — immediately after the press opens. Sublimation transfers should be peeled while still hot in one smooth, even motion. Allowing the transfer to cool before peeling lets the paper partially re-adhere to the ink and can pull it back off the garment.
Why is my sublimation print ghosting?
Ghosting is almost always caused by transfer movement. The transfer shifted during pressing or when the press opened — creating a blurry duplicate image. The fix is simple: use heat tape on all four edges of every transfer before pressing. Any movement at all during the press cycle will cause ghosting.
Why are my sublimation colors dull or washed out?
Most commonly caused by temperature being too low. Verify your actual platen temperature with an infrared thermometer. Other causes: press time too short, low polyester content in the garment, artwork submitted in CMYK instead of RGB, or a garment that isn't true white. Troubleshoot one variable at a time starting with temperature.
Do I need to put parchment paper inside the garment for sublimation?
Yes. Sublimation ink passes through the fabric under heat. Without parchment paper inside the garment, the ink will blow through and stain the back layer — or the heat press platen. Use a fresh sheet of parchment paper inside the garment for every single press.
Can I use an iron instead of a heat press for sublimation?
No. A household iron cannot provide the consistent, even temperature and pressure required for sublimation. Hot spots, uneven pressure, and inability to reach or maintain the correct temperature all make irons unsuitable. A heat press is required for professional sublimation results.
What polyester percentage do I need for sublimation?
Minimum 50% polyester for any usable sublimation output. For the best color saturation and accuracy, use 100% polyester. A 50/50 blend will produce noticeably lighter, more muted colors. Below 50% poly, results are poor and the process is not recommended.
How do I prevent ink blowthrough on sublimation garments?
Place a fresh sheet of parchment paper inside the garment between the front and back layers before every press. This catches any ink that passes through the front layer. Also verify your temperature isn't running significantly above 400°F — overheating increases ink blowthrough.
Where can I order sublimation gang sheet transfers in Phoenix?
Outta PHX Print Shop prints and ships sublimation gang sheets same-day from our North Phoenix location at 420 E Bell Rd, Suite #7, Phoenix, AZ 85022. We offer 10 sheet sizes from 22×12 to 22×120 inches and ship to all 50 states. Call 602-702-3480 or order online at outtaphx.com.
Need Sublimation Transfers to Press?
Same-day shipping from Phoenix. 10 sheet sizes. Pay only for what you print. No minimums — built for decorators running real production.
