Screen printing works by pushing ink through a mesh stencil onto a surface below, one color at a time. The process has a learning curve, but each step is straightforward once you understand what’s happening and why. Here’s how to go from a design on your computer to a finished print.
Create Your Design and Film Positive
Every screen print starts with artwork. You’ll need a separate design file for each ink color in your print, with each one output in solid black. These files are printed onto transparent film (called a film positive or acetate), which acts as a mask during the exposure step. If you’re printing a one-color design, you need one film. A three-color design needs three films, each representing where one color of ink will go.
Vector graphics software gives you the cleanest output, but any program that can produce a high-contrast black image on clear film will work. The key is density: the black areas on your film need to be truly opaque so they block light completely during exposure.
Choose the Right Mesh Count
The mesh stretched over your screen frame has tiny openings that allow ink to pass through. The “mesh count” refers to how many threads per inch the fabric contains, and it directly controls how much ink reaches your substrate and how much detail you can hold.
The two most common mesh counts are 110 and 156. A 110 mesh lays down a thick ink layer and works well for block letters and larger spot-color designs. A 156 mesh deposits nearly as much ink but holds finer detail, making it the default choice for many printers. For designs requiring extremely sharp detail, like photographic halftones or simulated process prints, a 305 mesh count captures those tiny dots cleanly. On the other end of the spectrum, specialty inks like glitter or shimmer require low mesh counts (38 to 86) because their large flakes won’t fit through standard openings.
Ink thickness matters here too. Thicker inks like white plastisol print best through lower mesh counts. Thinner inks like water-based or solvent-based formulas need higher mesh counts (around 230 and up) to prevent flooding. UV inks, which are extremely thin, often call for 355 to 400 mesh.
Coat the Screen With Emulsion
Photo emulsion is a light-sensitive liquid that you spread across the mesh using a scoop coater. When it dries and is exposed to UV light, it hardens. The areas blocked by your film positive stay soft and wash out, creating the open stencil that ink passes through.
How many coats you apply depends on your emulsion type and mesh count. High-solids emulsions leave more material behind with fewer passes, while lower-solids formulas may need additional coats to build proper thickness. For fine detail on higher mesh counts, a single coat on each side with a sharp coater edge works well. For bold artwork on lower meshes where you want a heavier ink deposit, a rounded coater edge helps build stencil thickness.
After coating, the screen must dry completely in a dark space. Surface dryness can be misleading. Think of a tomato: dry on the outside, still wet inside. The emulsion needs to be dry all the way through before you expose it. Temperature, airflow, and humidity all affect dry time. A drying cabinet can get screens ready in 20 to 30 minutes, but the simplest approach is to coat your screens the day before you plan to print.
Expose and Wash Out the Screen
Once the emulsion is fully dry, you place your film positive on the coated screen, load it into an exposure unit, and hit it with UV light. The light hardens the emulsion everywhere except where the black areas of your film block it. After exposure, you rinse the screen with water and the unexposed emulsion washes away, leaving open mesh in the shape of your design.
Exposure units come in several types. UV LED systems are now the most popular option: they expose quickly, produce low heat, and last a long time. Metal halide lamps were the traditional standard and still excel at fine detail and large screens, though they run hot and need warm-up time. UV fluorescent tubes are affordable and common in smaller setups but produce diffused light that limits resolution. Even direct sunlight works for hobbyists (roughly 30 seconds of exposure), though the results are inconsistent.
Getting the exposure time right is critical. Underexposed emulsion breaks down during printing, causing pinholes and lost detail. Overexposed emulsion won’t wash out cleanly. Most emulsion manufacturers provide a recommended exposure range, but you’ll want to run a step test with your specific setup to dial it in.
Set Up the Press
With your screen washed out and dry, mount it on the press and align it over your printing surface. One detail that makes or breaks print quality is off-contact distance: a small gap between the bottom of the screen and the substrate. You want roughly 3 to 5 millimeters of space.
This gap exists so the mesh lifts away from the surface immediately after the squeegee passes over it. Without it, the screen sticks to the substrate and drags wet ink, causing smearing and blurry edges. If the gap is too large, the squeegee can’t press the mesh down far enough to transfer ink evenly. The goal is to elevate the screen just enough that the edges of your design can still make full contact when pressed down by the squeegee stroke.
Print the Design
Lower the screen into position, pour a line of ink above your design area, and pull the squeegee across the screen in a smooth, even stroke. The squeegee forces ink through the open mesh onto the material below. One firm pass is usually enough for a single color on a light garment. Printing white or light colors on dark fabric often requires a second pass or a base layer to build opacity.
Picking the Right Squeegee
Squeegees are rated by durometer, a measure of blade hardness. Most textile printers use a 60 or 70 durometer blade. A 60 durometer is softer and more flexible, depositing more ink per stroke. It conforms well to textured fabrics like fleece and works naturally with thinner water-based inks. A 70 durometer is the versatile middle ground that handles most jobs. An 80 durometer blade is stiffer and better for fine detail, high-resolution work, and thicker plastisol inks on flat surfaces.
Angle and pressure matter as much as the blade itself. Hold the squeegee at roughly 45 degrees and apply consistent, firm pressure throughout the stroke. Uneven pressure leaves thin spots or pushes too much ink through in certain areas.
Cure the Ink
A print that looks finished isn’t actually done until the ink is fully cured. Without proper curing, the ink will crack, peel, or wash out of the garment.
Plastisol ink, the most common type for textile printing, cures at around 320°F (160°C). It starts to feel dry to the touch between 180 and 250°F, but that’s only a semi-cure, or “gel” state. The ink needs to reach full temperature all the way through the ink film, not just on the surface. A conveyor dryer is the most reliable tool for this, as it maintains consistent heat over a set time. A flash dryer (an overhead heating element positioned about 3 inches above the garment) can also fully cure a print in roughly 25 to 35 seconds at its highest setting.
White plastisol generally takes the longest to cure of any standard color. Specialty inks like glitter, shimmer, and metallic formulas also need extended cure times because the reflective pigments in them bounce heat away from the garment. Never exceed 350°F (176°C), as this can scorch the fabric or break down the ink.
When you’re printing multiple colors and need to flash between layers, you only need a partial cure (5 to 10 seconds) to set the surface so the next color doesn’t smear. The final full cure happens after the last color is printed.
Reclaim the Screen for Reuse
Screens are reusable. After a print run, you remove the ink, strip the emulsion, and start fresh for your next design.
Start by removing leftover ink from the mesh with a screen wash solvent and a soft nylon bristle brush, working in circular motions. Rinse with low-pressure water. Next, apply a stencil remover (emulsion remover) to both sides of the screen and let it sit briefly. Never let the remover dry on the mesh, as that makes the emulsion much harder to strip. Scrub gently with a soft nylon brush, avoiding metal-bristled or abrasive pads that can leave particles embedded in the mesh. Finish with a pressure washer to blast away all remaining emulsion.
When using a pressure washer, wear eye and ear protection. Inspect the screen against a light source afterward. Any residual emulsion or staining (called ghost images) can interfere with your next stencil. Haze removers can address stubborn ghost images, but a clean reclaim process minimizes the need for them.
Common Problems and Fixes
Ink bleeding or spreading beyond the design edges usually comes from too much ink being pushed through the screen. This can mean your squeegee is too soft, your pressure is too heavy, your mesh count is too low for the ink type, or your off-contact distance is insufficient. Reducing squeegee pressure, switching to a higher mesh, or increasing the gap between screen and substrate will typically solve it.
Pinholes in your print (tiny missing dots scattered across the design) point to problems during screen preparation. Dust on the film positive, underexposed emulsion, or a coated screen that wasn’t fully dry before exposure are the usual causes. You can patch small pinholes with screen block-out fluid, but if they’re widespread, re-coating and re-exposing the screen is faster than chasing fixes.
Uneven ink coverage often traces back to inconsistent squeegee technique or an unevenly coated screen. If the emulsion layer is thicker on one side, the stencil opening varies in depth, and the ink deposit follows. This is why a smooth, consistent coating matters. If you run out of emulsion mid-stroke or see visible ridges in your coating, reclaim the screen and start over rather than trying to patch it.