How to Prepare a Logo for Clothing Printing (UK Guide)

How to Prepare a Logo for Clothing Printing: A Plain-English UK Guide

You've got the logo. You've picked the t-shirts. You're one email away from ordering your first batch of custom clothing — and then your printer replies asking for "a vector file, ideally an AI or EPS, with text converted to outlines."

If that sentence made your eyes glaze over, this guide is for you.

Whether you're a small business ordering workwear, a band prepping gig merch, or a charity organising event t-shirts, the artwork you send is the single biggest factor you control in how good the final print looks. This guide explains what printers actually need, why they need it, how to check what you've got, and what to do if all you have is a fuzzy logo screenshotted from Facebook. (No judgement — it happens weekly.)

Quick answer

For the best print, send your printer a vector file (AI, EPS, SVG or vector PDF) of your logo with any text converted to outlines. If you only have an image file (PNG or JPEG), send the largest, highest-quality version you own, ideally a PNG with a transparent background. Never screenshot your logo from a website or stretch a small file bigger. If in doubt, send what you have and ask your printer to check it,  a good printer would far rather look first than print a blurry logo.

Why artwork quality matters so much

A printed garment is unforgiving. On a screen, a slightly soft logo can pass unnoticed. Printed 25cm wide across a chest, every fuzzy edge, jagged curve and stray white halo is on display — permanently, on something a human being wears in public.

Good artwork prep isn't about being fussy. It's the difference between merch that looks professionally made and merch that looks like it was printed off the office inkjet.

Vector vs raster: the two-minute version

This is the concept behind almost every artwork conversation, so let's nail it.

Raster images (JPEG, PNG, most Photoshop files) are made of pixels — tiny coloured squares. Zoom in far enough and you see the squares. Enlarge a raster image beyond its original size and it goes blurry, because you're just making the squares bigger.

Vector images (AI, EPS, SVG, some PDFs) are made of mathematical shapes and curves. They can be scaled to any size — business card or billboard — with perfectly crisp edges, because the maths redraws the shapes at whatever size you need.

For clothing printing, vector artwork is the gold standard. Your logo can be resized for a chest print, a back print or a sleeve without losing a whisker of sharpness.

How to tell what you have: check the file extension. .ai, .eps, .svg are vector. .jpg, .jpeg, .png, .gif are raster. PDFs are the tricky ones — they can contain either, so your printer may need to open it to check.

One common trap: saving a JPEG as a PDF or dropping it into an SVG doesn't make it a vector. It's the same pixels in a different wrapper — like putting a takeaway in a fancy box and calling it fine dining.

The ideal file: what printers hope lands in their inbox

If you can supply this, you're a dream customer:

• A vector file — AI, EPS, SVG or vector PDF
• Text converted to outlines (also called "curves") — this turns fonts into shapes so the design looks identical even if the printer doesn't own your font
• A transparent background — so only your logo prints, not a white box around it
• Colour references if brand colours matter — Pantone numbers or at least hex/CMYK values
• The logo at a sensible scale with nothing important touching the edges

Don't panic if some of that is unfamiliar. Whoever designed your logo can usually export this in minutes — it's a standard request.

"I only have a PNG or JPEG" — what to do

Extremely common, and often workable. Follow these steps:

Step 1: Find the biggest version you own. Dig through old emails from your designer, your website files, or the original order. Bigger files hold more detail.

Step 2: Prefer PNG with a transparent background. A transparent PNG means no white rectangle printed around your logo. If your logo appears on a white box when placed over a coloured background, it isn't transparent.

Step 3: Check it at print size. On screen, zoom until the logo is roughly as large as it'll be printed (a typical chest logo is around 8–10cm wide; a full front print might be 25–30cm). If edges look soft or blocky at that size, it may struggle in print.

Step 4: Never enlarge it yourself. Stretching a small image to a bigger size adds blur, not detail. Send the original and let your printer advise.

Step 5: When it's not good enough — redraw it. Low-quality logos can be professionally redrawn as vectors. Many printers (ourselves included) offer artwork redraw services, and for a simple logo it's usually a modest one-off cost that pays for itself on every future order.

Realistic scenarios from the print room

• A plumbing business with a logo from a £20 online logo maker: they only have a small JPEG. It's fine at embroidery-badge size but too soft for a large back print. Solution: a quick vector redraw, then it's usable forever — vans, workwear, signage, the lot.
• A band with album art designed in Photoshop: raster is fine here, because it's a detailed illustration, not a logo. The key is that it was created at high resolution at the intended print size. Illustrative designs and logos follow slightly different rules — ask your printer.
• A charity sent a logo copied from their own website: 200 pixels wide, perfect for a webpage, hopeless for a t-shirt. The original designer had the vector all along — one email retrieved it.

Colours, backgrounds and garment choice

A few things people forget until the mock-up stage:

• Your logo will sit on a coloured garment. A dark blue logo vanishes on a navy hoodie. Ask whether you have (or need) a light/reversed version of your logo for dark garments.
• Screen colours and printed colours differ. Screens glow; fabric doesn't. If exact brand colours are critical, give your printer colour references and ask what's achievable on your chosen garments.
• Fine detail has limits on fabric. Hairline strokes and tiny text that look sharp on screen can struggle on textured fabric. Simplifying slightly often produces a better-looking garment.

This is also where garment choice and artwork meet — if you haven't picked your garments yet, our guide to what GSM means is a good place to start.

What to actually send your printer

When you email your artwork over, include:

1. The best file you have (vector if possible)
2. Which garments and colours it's going on
3. Where you want it printed (chest, back, sleeve) and roughly how big
4. Any brand colours that must match
5. A simple note on what the design should look like, if there's any room for doubt

Then let them check it. Any decent printer will flag problems before printing, and most will happily produce a mock-up so you can see exactly what you're approving.

Quick checklist: is my logo print-ready?

Copy and keep:

• I have a vector file (AI, EPS, SVG or vector PDF) — or the best-quality PNG/JPEG available
• Text is converted to outlines (vector files)
• The background is transparent (or I've told my printer what should happen with it)
• The logo looks crisp when viewed at actual print size
• I have a version that works on dark garments (if needed)
• I've noted any must-match brand colours
• I've told my printer the garment, print position and rough size
• I've asked for a mock-up before approving the order

Common mistakes (and how to avoid them)

1. Screenshotting the logo from a website or social media. Web logos are tiny and compressed. Always hunt down the original file — or ask whoever designed it.

2. Enlarging a small image and hoping. Upscaling adds blur, not quality. Send the original size and let your printer judge.

3. Sending a logo with a baked-in white background. On a black tee, that prints as a white box. Request a transparent PNG or vector version.

4. Assuming a PDF is automatically a vector. PDFs can contain pixel images. If it started life as a JPEG, it's still a JPEG inside.

5. Forgetting fonts. If a vector file's text isn't outlined and the printer doesn't have your font, the design can change unexpectedly. Ask your designer to "convert text to outlines" before exporting.

6. Not checking how the logo works on the actual garment colour. Approve a mock-up on the real garment colour, not a white background.

Frequently asked questions

What file format is best for t-shirt printing?
A vector file — AI, EPS, SVG or vector PDF. If unavailable, a large, high-quality transparent PNG is the next best thing.

What does "vector" actually mean?
Artwork built from mathematical shapes rather than pixels, so it stays perfectly sharp at any size.

Can you print from a JPEG?
Often, yes — if it's large and sharp enough for the print size. Your printer can check it for you.

My logo is blurry. Can it be fixed?
Not by enlarging it — but it can usually be redrawn as a vector, which fixes it permanently.

What is a transparent background and why does it matter?
It means the area around your logo is empty rather than white, so only the logo itself prints on the garment.

Do I need different logo versions for light and dark clothing?
Frequently, yes. Many brands have a standard version and a reversed/light version for dark garments.

What does "convert text to outlines" mean?
Turning the fonts in a design into fixed shapes, so the design displays identically on any computer, fonts installed or not.

Can my printer just sort all this out for me?
Largely, yes — a good printer will check your artwork, flag issues, and offer redraws and mock-ups. Sending what you have and asking is always a legitimate first step.

Ready to print something you're proud of?

Preparing a logo for printing boils down to this: find the best original file you own, understand whether it's vector or raster, make sure it works at print size and on your garment colour — and let your printer check it before anything hits fabric.

At The Inner Sanctum Group, artwork checking is part of the job. We can look over your files, redraw logos that aren't print-ready, create mock-ups on your chosen garments, advise on print positions and sizes, and handle the printing itself — whether it's five staff polos or a full merch range. And if you're starting from "I've only got this screenshot," that's genuinely fine. Start there and we'll help.

Website: https://theinnersanctumgroup.co.uk
Email: printing@theinnersanctumgroup.co.uk
Telephone: 07572 910764