Choosing T-Shirt Fabric: Cotton vs Polyester vs Blends for Printing

Most customers spend hours perfecting their artwork and then pick the shirt in about four seconds. We understand — the design is the fun part. But after years at the press here in Ottawa, we can tell you the single most common reason two seemingly identical orders come out looking different is the blank underneath the ink. Choosing the best t-shirt fabric for printing is genuinely half the job, and it's the half almost nobody thinks about until the shirts are in their hands.

So this is the honest, plain-English version of the conversation we have across the counter every week. What cotton, polyester and blends actually do under a print, what all those GSM numbers on the spec sheet mean, and how to match the fabric to your design so it looks sharp on day one and still looks sharp after a summer of washing. Whatever you land on, our t-shirt printing team can put your art on it.

Cotton: combed, ringspun, and how it takes ink

Cotton is the default for a reason. It's a natural fibre, it breathes, it's soft against the skin, and — the part that matters to us — it drinks up ink. When you press plastisol or a DTF transfer onto cotton, the ink settles into the fabric and the colours come out rich and true. If you want the most reliable, most vibrant print with the least fuss, a good cotton tee is very hard to beat.

Not all cotton is equal, though, and this is where the spec sheet gets confusing. The plain "ringspun vs combed cotton" question comes up a lot, so here's the short version. Ringspun cotton is spun with a twisting process that produces a finer, stronger, smoother yarn than cheap "carded" cotton. Take that a step further and you get combed cotton, where the short stray fibres are combed out before spinning. The result is a flatter, smoother surface — and a smoother surface means crisper print detail.

Almost every tee we print is a jersey knit — that fine, slightly stretchy single-knit you see on any classic t-shirt. A tight, even jersey in combed ringspun cotton is the friendliest canvas there is for fine lines and small text. A midweight cotton blank in Ottawa typically runs roughly $6-$10 per garment before printing; premium ringspun fashion tees sit higher, more like $12-$18.

Polyester: performance, and the dye-migration catch

Polyester is the performance fibre. It wicks moisture away from the skin, dries fast, resists shrinking and wrinkles, and holds its shape through a rough season. That's why every sports jersey, running shirt and gym top you own is mostly polyester. If your job is athletic — a team, a race, anything people will sweat in — polyester earns its keep.

Here's the catch we warn every customer about: dye migration. The dyes used to colour polyester can reactivate under the heat of a curing tunnel or a heat press, and when they do, they bleed up into your print. A crisp white logo on a red performance shirt can turn a muddy pink days later. It's the classic "cotton vs polyester t-shirt" trade-off — polyester performs, but it fights back a little. We beat it with low-cure inks, a poly-blocking underbase, or a DTF transfer pressed at the right temperature, so it's a solvable problem — it just has to be planned for, not discovered after the fact.

Blends and tri-blends: the comfortable middle

Most people don't actually want pure anything — they want the comfort of cotton and the toughness of polyester in one shirt. That's a blend. A 50/50 (half cotton, half polyester) is the classic all-rounder: softer than pure poly, more durable and less shrink-prone than pure cotton, and it takes a print well. A 65/35 leans a little more toward polyester's performance side.

Then there's the tri-blend — cotton, polyester, and rayon woven together. A tri-blend is the shirt that feels almost suspiciously soft and drapey, with a subtle heathered, vintage look. Our customers love them for retail-style merch and premium event tees. The one thing to know: that heathered surface slightly mutes bright, solid ink, so a tri-blend flatters a soft, distressed design more than it flatters a hard, saturated block of colour. For full-colour art, DTF is the method that handles a tri-blend best.

What GSM and shirt weight actually mean

The single most useful number on any blank's spec sheet is its fabric weight (GSM). So what does GSM mean in practice? It's grams per square metre — literally how much a square metre of the fabric weighs. It's the most honest signal of how heavy, opaque and substantial a shirt will feel in your hands. Higher GSM generally means more durable and less see-through, but also warmer and a bit more expensive.

For the vast majority of custom jobs, a midweight blank in the 150-180 GSM range is the sweet spot — heavy enough to feel like a real shirt and hide the seams of a print, light enough to wear comfortably in an Ottawa summer. We only steer people to a heavyweight when they specifically want that premium, structured feel or need the extra toughness for uniforms and workwear.

Matching the fabric to the print method

Fabric and method are a package deal — you really can't choose one without the other. If you're still deciding how you want the shirts decorated, we broke that down separately in our guide to the four printing methods. Here's how the common fabrics pair up with each one.

Cotton is the happiest fabric on a screen printing press — the ink cures cleanly and the colours pop. Polyester and tri-blends are where DTF quietly wins, because a well-pressed transfer sidesteps most of the dye-migration headaches. If budget is driving the decision, the fabric you pick moves the number as much as the method does; we put real figures behind that in our breakdown of what custom shirts cost in Ottawa.

So what is the best t-shirt fabric for printing?

After all of that, here's the honest answer: there is no single best t-shirt fabric for printing — there's a best fabric for your job. But the shop's fast rules of thumb get you 90% of the way there:

• Everyday tees, sharpest print, best value → midweight 100% cotton, ideally ringspun.
• Soft, premium, retail-style merch → combed ringspun cotton or a tri-blend.
• Sports, gym, anything you'll sweat in → polyester or a 65/35 performance blend.
• A mix of colours and fabrics in one small order → any blend, printed with DTF.
• Still not sure? Tell us the design, quantity and where it'll be worn — we'll pick the blank for you.

Get the fabric right and the print does the rest. Whether it's a hundred midweight cotton tees for a company or a dozen tri-blends for a launch, our t-shirt printing service handles the whole thing under one roof here in Ottawa — blank sourcing, printing and all.

Frequently asked questions