How to screen print t-shirts, at home and in production

Screen printing pushes ink through a mesh stencil onto the garment, one colour at a time. A screen is coated with light-sensitive emulsion, exposed to UV light through a film positive of the artwork, and washed out so ink can only pass where the design is. The screen is then set a couple of millimetres above the shirt, ink is flooded across the mesh and pulled through with a squeegee, and the print is cured with heat so it survives washing. Every colour needs its own screen, its own registration and its own pass, which is why colour count drives everything else about the job.

What screen printing is, and why it is also called silk screen

Screen printing is a stencil process. A frame holds a fine mesh, the mesh carries a stencil that blocks ink everywhere except the design, and a squeegee forces ink through the open areas onto whatever sits below. The same technique prints posters, signage and t-shirts. Only the ink and the substrate change.

The older name comes from the mesh, which was once strung with silk and is now monofilament polyester woven to a known thread count. Silk screen printing and screen printing are the same process and the terms are used interchangeably.

One fact shapes the rest of this article. A stencil is a fixed object and can pass only one ink at a time, so a two-colour design needs two screens and a six-colour design needs six. The work sits at the front, in the separations, the screens and the setup, and that work does not grow when the run does. Once the press is registered, each extra shirt takes seconds. That is why screen printing is still the default for volume on cotton, and why it makes very little sense for one shirt.

How to screen print a t-shirt, step by step

1. Separate the artwork. Split the design into individual colours, each output as solid black on clear film. Density matters, because a grey film lets UV through and ruins the stencil. Where two colours meet, spread the lower shape slightly so a small movement on press does not open a white gap. That is trapping, and skipping it is why a lot of home multi-colour work looks ragged at the joins.
2. Choose the mesh. Thick, opaque ink needs a coarse mesh. Fine lines and halftone dots need a fine one. This is not recoverable later.
3. Coat the screen. Under a yellow safelight, draw emulsion up the print side of the mesh with a scoop coater, then the squeegee side, in a consistent number of passes. Dry it flat and in the dark, print side down, in warm air rather than hot.
4. Expose. Tape the film to the outside of the screen, emulsion side against the mesh so there is no gap, and expose for the time you have established by testing. UV hardens the emulsion everywhere the black artwork does not block it.
5. Wash out. Wet both sides, wait a moment, then rinse gently until the image opens. Dry the screen, hold it to a light, block any pinholes, and tape the inside edges so ink cannot escape past the emulsion.
6. Set off-contact. Clamp the screen so the mesh sits roughly two to three millimetres above the shirt, not on it. That gap lets the mesh peel away behind the squeegee and leave a clean ink film instead of a smear.
7. Load the shirt. Spray the platen with pallet adhesive so the garment cannot lift, slide the shirt on square, and check the placement against a physical mark rather than by eye.
8. Flood, then print. Drag a light layer of ink across the mesh with no pressure to fill the open image. Then pull the print stroke: the squeegee held around fifteen degrees off vertical, at an even speed, with only enough pressure to shear the ink cleanly off the mesh in one pass. More pressure does not push through more useful ink. It bends the blade flat, forces ink under the stencil edge and blurs the print.
9. Flash between colours. Pass the shirt under a flash unit until the ink gels, then let it cool before the next screen touches it.
10. Cure. Take the finished print up to cure temperature through the full thickness of the ink film. The garment is finished when it leaves the dryer at the right temperature, not when it leaves the press.

Mesh count, and what it decides

Mesh count is threads per inch, or per centimetre in metric markets. It decides how much ink passes through and how much detail the stencil can hold, and those two things pull against each other.

A coarse mesh of roughly 86 to 110 lays down a thick ink film. That is what an opaque white on a black shirt needs, what a white underbase needs, and what glitter and metallic inks need because they carry large particles. It cannot hold fine detail, since a thin line is barely wider than the threads it has to bridge. Around 156 is the general-purpose compromise for single-colour spot work. From 200 to 230 suits finer line work, water-based ink and lighter deposits, and 305 is halftone territory. As mesh gets finer the print feels softer and opacity drops, and very fine mesh with heavy plastisol simply clogs.

Halftones add a rule. Gradients are printed as dots, and the mesh has to resolve them: roughly three and a half to five times the line count of the halftone. Print a 55 line halftone through a 110 mesh and the dots fall between threads, so the shading breaks into blotches.

Emulsion, exposure and washout

Emulsion is a light-sensitive coating that UV crosslinks into a hard, water-resistant film. Wherever the black areas of the film block the light, the emulsion stays soluble and washes away, leaving open mesh in the shape of the design. The stencil is a negative of the artwork made from hardened liquid.

Exposure time depends on the emulsion, the lamp, the distance and the mesh count, so a number copied from a video is worthless. It is found with a step test: expose one screen in bands of increasing time and see which band washes out cleanly while holding detail.

The two failure modes look different. An underexposed screen washes out too easily, loses fine detail, feels slimy, and then breaks down partway through the run as the squeegee wears through the soft stencil. An overexposed screen refuses to open in the fine areas, so thin lines and small text never appear. Underexposure is the more common and the more expensive, because it usually reveals itself after fifty shirts rather than at the sink. Coating thickness matters too: too thin and the stencil sits below the surface of the threads, so the ink film picks up the mesh texture and the edges look rough.

One screen per colour: registration, underbase and flash

Six colours means six films, six coated screens, six setups and six passes over every garment. This is where the work and the time actually sit, and it is the thing to understand before commissioning screen printing.

Registration is the job of making those passes land in the same place. On a multi-station press each screen is aligned using registration marks on the films and micro-registration screws on the clamps, which move the screen in fractions of a millimetre. On a fine outline sitting over a fill, a movement you can barely see is the difference between a crisp print and a shadow, and that alignment has to hold for the whole run.

Garment colour adds a screen of its own. Ink is translucent, so a red printed straight onto black reads as dark brown. The answer is an underbase: a white layer printed first in the shape of the artwork, flashed until it gels, then printed over so the colours have a white ground. A four-colour design on a black shirt is really a five-colour job, with an extra screen, an extra station and a flash cycle on every piece.

Flash curing is what makes stacking colours possible. It gels the surface so the next screen does not lift the ink, without taking it to full cure. The detail that catches people out is cooling: ink that is still hot sticks to the underside of the next screen and builds up, so production presses use a cool-down station between the flash and the next colour.

Curing, and why it decides whether the print survives

Plastisol does not dry. It is PVC particles suspended in plasticiser, and it stays wet in the screen indefinitely, which is one reason it is so widely used. It becomes a solid film only when the whole thickness of the ink reaches its fusion temperature, which for most plastisols is around 160C.

The phrase to hold on to is all the way through. A heat gun, or a quick blast under a flash, takes the surface to temperature while the ink against the fabric stays raw. It looks perfect, it passes a fingernail, and it cracks and lifts on the third wash. Proper curing means a dryer that holds the garment in a heated chamber long enough for the full ink film to come up to temperature, which is a combination of belt speed and heat rather than a single number.

Temperature is measured rather than guessed, with a probe that travels through the dryer and reads the ink film itself. Two physical checks back it up: stretch the print across your fingers, since cured plastisol stretches with the fabric and returns without cracking, and wash a printed piece several times before bulk goes out. Other inks change the rules. Water-based and discharge inks need the water driven off as well as the binder cured, so they need longer. On 100 percent polyester the opposite risk applies, because too much heat pulls the fabric's own dye up into the ink and the print discolours days or weeks later, which is why polyester work uses low-bleed inks and the lowest cure that fully fuses.

Where the DIY route stops working

Screen printing at home works properly inside a defined boundary: one colour, flat spot artwork, a light garment and a small number of pieces. A screen in a mid mesh, a hinged clamp on a board, a squeegee, plastisol and a heat press will produce prints indistinguishable from a shop's work. None of the process is a trade secret. Four things end that route, and they arrive in a predictable order.

Colour count. The second colour introduces registration, which is a hardware problem rather than a skill problem. Without micro-registration and a rigid, repeatable clamp, aligning a second pass over a first fails differently on every shirt. Two colours is achievable with careful trapping and forgiving artwork. Four is not.

Dark garments. A dark shirt means an underbase, so before any of the design is printed you need an opaque white through a coarse mesh, a flash, a cool-down and a registered second pass. This is the wall most home setups hit first, and it is why white ink on black has a reputation for being difficult.

Cure consistency. A domestic iron cannot cure plastisol. A heat gun cures the surface only. A heat press genuinely can, but it needs a known temperature and time and it handles one print at a time. Across fifty garments the risk is not that curing fails, it is that it fails on some of them and you cannot tell which until a customer washes them.

Volume. A single station produces one shirt at a time with a manual cure between each, while a production press prints and flashes at one station while another is loading. Beyond a few dozen pieces, time and reject rate stop being a hobby cost and become the whole cost.

The DIY route is excellent for learning, for testing whether a design works on cloth, and for a drop of twenty single-colour tees. Once a design has several colours, sits on a dark garment, or has to be identical across a wholesale order, hand it to a printer or a t-shirt manufacturer and spend the effort on the artwork instead.

What drives the cost of a screen print job

Screen printing has an unusually clear cost structure, and knowing it is more useful than any number, because it tells you which decisions move a quote. Some costs are fixed per style and paid once regardless of quantity. The rest repeat on every garment.

Fixed per style, paid once

• Number of colours. The main driver. Each colour is a separation, a film, a coated screen, an exposure, a setup on press and a screen to reclaim afterwards.
• Garment colour. A dark garment needs a white underbase, so it adds a colour before the design is even considered.
• Number of placements. Front, back, sleeve and neck are separate jobs with their own screens and setups.
• Artwork condition. Clean vector separates quickly. A flattened image that has to be redrawn or converted to halftones is work before printing starts.

Repeating on every garment

• Number of passes. Every colour, plus the underbase, is a physical pass with a flash cycle between them.
• Print size. A large front print uses more ink and more dryer time than a small chest mark.
• Ink type. Puff, high-density, metallic and discharge run slower and less predictably than standard plastisol.
• Fabric. Polyester and poly blends need low-bleed inks and tighter cure control, and heavy fleece takes a different setup from light jersey.
• The garment itself. On cut-and-sew work the blank does not exist yet, so cloth, trims and making are the larger part of the piece cost, with the print sitting on top.

Two things follow. Run length changes the cost per piece sharply without changing the cost of the job much, because the fixed half is divided by more units, which is the real reason screen printing has minimums at all and is covered in our note on minimum order quantity. And colour count is the lever you control: taking a design from five colours to three, or moving it onto a natural garment so it no longer needs an underbase, moves a quote further than almost anything else. Ask for the same artwork quoted both ways and the structure becomes obvious.

Screen print against DTG, DTF, embroidery and sublimation

Screen printing is the default for volume on cotton, not the default for everything. The useful comparison is where each method puts the colour and what it costs in setup.

In practice fabric and run length decide before anything else. On cotton, in quantity, with flat brand colours, screen printing wins on cost per piece, on opacity and on how long the print lasts. On the same cotton in ones and twos, DTG or DTF is the sensible answer because there is no setup to absorb. For a graphic that crosses seams the garment has to be polyester and the method is sublimation, printed onto the panels before the garment is sewn. For a small mark that has to look substantial, embroidery beats every print method here. Fibre content rules methods in or out before anything else is discussed, which our streetwear fabric guide covers by garment type.

Screen printing at NO FUGAZI

NO FUGAZI is a London-managed custom clothing manufacturer producing at its own dedicated facility. We are cut-and-sew, so garments are made from cloth to a pattern rather than bought as blanks and decorated. The print is planned alongside the garment, which means placement, print size and the fabric under the ink get decided together.

Screen printing sits alongside high-density silicone screen print, puff print, DTG, DTF, vinyl, embroidery, 3D and puff embroidery, appliqué, chenille patches, rhinestone, laser engraving, reflective and glow-in-the-dark embroidery and reflective piping. One piece can carry a screen printed graphic with an embroidered mark over it, which is a common combination on hoodies.

You do not need a tech pack to start. A reference image, a sketch or a garment you already own, plus a description of what you want changed, is a normal beginning, and the technical side gets drafted from that. The minimum order is 50 pieces per style. Sampling is not charged as a separate line when you commit to a bulk run with a deposit: the sample is made first and the deposit counts towards the bulk total, while a standalone sample without a bulk commitment is charged separately. On screen print work the sample is where colour, placement and cure get approved, and a wash test on it is worth more than any assurance about the process.

Send the artwork, the colours you need matched, the garment, the quantity and the placements, and we will say plainly if screen printing is the wrong method for it. WhatsApp is fastest, on +44 7537 134878, or use the brief form. We ship worldwide.

Questions

How do I screen print a t-shirt at home?

Coat a screen with emulsion in a dark room, dry it flat, expose it to UV light through a black film positive of the design, then wash out the unhardened emulsion to open the stencil. Clamp the screen a couple of millimetres above the shirt, flood the mesh with ink, pull one firm squeegee stroke, and cure the print at around 160C through the full thickness of the ink. Start with one colour on a light garment.

How does silk screen printing work?

Silk screen printing and screen printing are the same thing. A fine mesh stretched on a frame carries a stencil of light-hardened emulsion, which blocks ink everywhere except the design. A squeegee forces ink through the open mesh onto the garment below, leaving an ink film that is then heat cured into a solid layer. The mesh was historically silk and is now polyester, but the name stayed.

Why does each colour need its own screen?

A stencil is a fixed physical object and can pass only one ink at a time. A three-colour design needs three separated films, three coated screens and three registered passes over every garment, with a flash cure between them so wet ink does not lift onto the next screen. On a dark garment a white underbase adds a fourth screen before any design colour is printed.

How much does screen printing cost?

It depends on structure rather than a rate. The drivers are the number of colours, since each is a separate screen and setup, whether the garment is dark and needs a white underbase, the number of placements, the length of the run, the ink type and the fabric. Setup is fixed per style, so cost per piece falls as quantity rises. Ask for the same artwork quoted at two different colour counts and the structure becomes clear.

What temperature does screen print ink need to cure?

Standard plastisol fuses at around 160C, and the whole thickness of the ink film has to reach it rather than just the surface. That is why a heat gun or a quick flash is not curing. Water-based and discharge inks need the water driven off as well, so they take longer. An undercured print looks perfect and then cracks or washes away within a few washes.

Is screen printing better than DTG or DTF?

For flat spot colours on cotton in quantity, yes, on cost per piece, opacity and durability. For a photographic image, a design with many colours, or a run of a handful of pieces, no, because the setup cost per colour cannot be spread far enough. DTG and DTF have no setup and no colour count, and DTF also prints onto fabrics that screen printing handles awkwardly.

Related reading

• What is a sublimation printer? — the method to reach for when a graphic has to cross a seam
• Streetwear fabric guide — which cloth suits which decoration method
• Minimum order quantity, explained — why setup cost makes very short runs inefficient
• How to start a clothing brand in the UK — where decoration decisions sit in the wider process
• Screen printing vs DTG vs embroidery: how to choose – which decoration method suits your artwork, fabric and run length
• How does embroidery work on clothes? – digitising, stitch count, and what embroidery is bad at
• Where to get t-shirts printed in the UK, and when to cut and sew instead – the options, and which one fits the run you have in mind