Which side of sublimation paper do you print on

Introduction

If you've ever held a sheet of sublimation paper and wondered which side goes into the printer, you're not alone. It's one of the most common questions from new sublimation crafters — and the answer matters more than you might think. Print on the wrong side, and your design will smudge, fail to transfer, or produce a faded, patchy mess.

In this guide, we'll break down the basic structure of sublimation paper, explain exactly which side to print on and why, show you how to reliably identify the coated side, and walk through the fundamental printing steps. By the end, you'll never second-guess your paper orientation again.

1. The Basic Structure of Sublimation Paper

Sublimation paper is not like regular printer paper — it has a distinct two-layer structure. Understanding this structure is the key to understanding which side to print on and why it matters.

The coating on the printable side is a polymer layer specifically engineered to work with dye-based sublimation ink. When heat is applied, this coating releases the ink as a gas, allowing it to bond with the polyester or polymer-coated surface of your blank. Without this coating, the ink would soak into the paper fibers and never transfer properly.

For a deeper dive into what sublimation paper is and how it works at the molecular level, check out our complete guide on what is sublimation paper.

2. Which Side Do You Print On?

The answer is simple: always print on the coated side. But the "why" is worth understanding, because it explains everything else about sublimation paper's behavior.

Why the Coated Side Matters

Sublimation ink is dye-based and behaves very differently from standard pigment ink. When you print on regular paper, you want the ink to soak into the fibers and stay there. But with sublimation, you want the ink to sit on the surface, ready to be released as a gas when heat is applied.

The polymer coating on the printable side is what makes this possible. It acts like a "launch pad" for the ink — holding it in place until the heat press triggers the sublimation process. The uncoated back side, by contrast, absorbs ink like ordinary paper, which means the ink gets trapped and can't transfer.

Printer Tray Orientation

Here's the practical question: does the coated side go face-up or face-down in the printer tray?

The answer depends on your specific printer model, because different printers feed paper through different paths:

• Most Epson EcoTank and standard inkjet printers: Load with the coated side face-up.
• Some printers with rear-load trays: Load with the coated side face-down, depending on whether the paper flips during feeding.
• Sawgrass and dedicated sublimation printers: Typically coated side face-up, but always check the manual.

3. How to Identify the Coated Side

Not sure which side is coated? Here are four simple methods to find out.

Method 1: The Touch Test

Run your finger lightly across both sides of the paper. The coated side feels noticeably smoother and slightly slicker. The uncoated back feels rougher, more like standard copy paper.

Method 2: The Visual Test

Hold the paper under bright light and tilt it back and forth. The coated side will have a subtle sheen or satin-like reflection. The back will look flat and matte.

Method 3: The Damp Finger Test

Lightly touch a damp finger to each side. The coated side repels the moisture and doesn't absorb it quickly. The uncoated side will absorb the moisture and feel damp almost immediately.

Method 4: The Scratch Test

Gently scratch the surface with your fingernail. The coated side resists marking and feels smooth. The uncoated side may show a slight mark or feel "grippy" under your nail.

4. Basic Printing Steps

Now that you know which side to print on, here's the fundamental printing workflow.

Step 1: Prepare Your Design

Create or open your design in your preferred software. Mirror the image horizontally before printing — this is non-negotiable for anything with text, logos, or directional elements.

Step 2: Load the Paper Correctly

Load a single sheet of sublimation paper with the coated side facing the correct direction for your printer. Don't overload the tray — one sheet at a time reduces the chance of misalignment and jamming.

Step 3: Configure Printer Settings

• Resolution: 300 DPI minimum (600 DPI for fine details)
• Paper Type: Photo Paper or Matte Paper — never Plain Paper
• Quality: High or Best
• Mirror: Enabled
• Scaling: Off (100% size, no "fit to page")

Step 4: Print a Test Sheet

Before committing to your final design, print a test page. Check:

• Colors look vibrant, not washed out
• Design is mirrored correctly
• Ink sits on the surface, not soaking into the paper
• No smudging when gently touched after drying

Step 5: Print the Final Copy

Once the test looks good, print your final design. Let the sheet dry for a few seconds after printing. Your sublimation paper is now ready for the heat press step.

5. What Happens If You Print on the Wrong Side?

If you accidentally print on the uncoated side, here's what you'll see — and what to do about it.

Symptoms of Wrong-Side Printing

• Ink immediately soaks into the paper, leaving a dull, flat appearance
• The print smears easily when touched, even after drying
• Transfer results are extremely faded or completely blank
• Paper may curl or wrinkle as it absorbs excess ink

What to Do If You Printed on the Wrong Side

Don't try to press it anyway. A wrong-side print will not transfer properly, and you risk damaging your blank with smeared ink. Discard the sheet and reprint on the correct side. It's frustrating, but it's a lesson every sublimation crafter learns once and never forgets.

7. Frequently Asked Questions

Which side of sublimation paper do you print on?

You always print on the coated side — the smoother, slightly glossier side of the paper. The coating holds sublimation ink on the surface so it can release as a gas during heat transfer. Printing on the uncoated side causes the ink to soak in and fail to transfer.

How do I know which side is coated?

Use the touch test first: the coated side feels noticeably smoother and slicker than the rough, matte back. If you're still unsure, lightly touch both sides with a damp finger — the coated side repels moisture, while the uncoated side absorbs it.

Does the coated side go face-up or face-down in the printer?

For most inkjet printers, face-up. However, some rear-loading printers require face-down because the paper flips during feeding. Always check your printer manual or run a test print if you're unsure.

What happens if I print on the wrong side?

The ink soaks into the paper instead of sitting on the surface. The print will look dull, smudge easily, and won't transfer when heat-pressed. Discard the sheet and reprint on the correct side.

Is sublimation paper the same on both sides?

No. Sublimation paper has a distinct coated printable side and an uncoated backing side. The two sides look similar at a glance but behave very differently — always confirm which is which before printing.

Can I use sublimation paper in a regular printer?

Only if the printer is loaded with sublimation ink and is compatible with the paper type. A standard inkjet printer with regular ink won't produce transferable prints. Learn more about sublimation paper and printer compatibility here.

8. Keep Learning

Continue your sublimation journey with this reading path, designed to take you from beginner basics to advanced techniques: