Screen Printing Troubleshooting: Problems and Solutions Table
Screen printing troubleshooting: a symptom table covering screen, press, ink, cure and garment problems, with the first check and a link to each full fix guide.
Index page for screen printing problems: sort each symptom by where it shows up (screen, press, ink, cure or garment), make the first check, then open the full DAX fix guide.
Screen printing troubleshooting works fastest when you sort the problem by where it shows up: the screen and stencil, the press, the ink and cure, or the garment. Make the most likely first check for that area, change one thing at a time, and open the full guide for the fix.
How to use this index: find the symptom in the table, read the short answer below it, then follow the link. Each linked page carries the complete diagnosis, settings ranges and tests, so this page stays short on purpose.
Part of the screen printing guides in the DAX Learning Hub. New to the process? Start with Screen Printing for Beginners.
Screen Printing Troubleshooting Table
Use this table as a first pass. The "likely area" column points you at the stage of the process to look at before you touch anything else.
| Symptom | Likely area | First check | Full guide |
|---|---|---|---|
| Tiny dots or specks of ink outside the design | Screen and stencil | Dust, dirty glass or film, air bubbles in the coating, underexposure | Screen printing pinholes |
| Ink spreading past the edges | Ink and press | Ink too thin, debris under the stencil, off contact, mesh too coarse for the detail | Screen print ink bleeding |
| Double edges or a blurry image | Press | Off contact (snap off), loose frame or low mesh tension | Screen printing registration |
| Colors not lining up | Press and screens | Screens clamped square, registration marks, even tension across the screen set | Screen printing registration |
| Stencil breaking down during the run | Screen and stencil | Exposure and screen dryness before exposure | Emulsion exposure times |
| Print cracks or washes out | Cure | Stretch test at room temperature, ink thickness, actual ink film temperature | How to cure plastisol ink |
| Light ink turning pink, gray or off color on polyester | Garment | Dye migration from the fabric into the ink | Dye migration on polyester |
| Old image showing in a reclaimed screen | Screen | Reclaim and haze removal steps | Screen reclaiming and ghost images |
| White looks weak on dark shirts | Ink and press | Underbase, flash and ink deposit | White underbase screen printing |
Screen and Stencil Problems
Pinholes and specks
Pinholes usually trace back to dust or dirt on the glass, film or screen, air bubbles in the emulsion, or a stencil that was underexposed. Clean the work area and coat slowly before you blame the ink. Pinholes in Screen Printing: Causes and Fixes walks through each cause.
Stencil breakdown and weak screens
A stencil that thins out, scums or breaks down mid run is most often underexposed, and screens that were still damp at exposure behave the same way. Verify exposure for your actual mesh and coating rather than reusing one time for every screen. See Emulsion Exposure Times for the test method.
Ghost images after reclaiming
If a faint old image is still visible after you strip the stencil, the reclaim process needs adjusting before that screen goes back into rotation. Screen Reclaiming and Ghost Image Removal covers the steps and safety notes.
Press and Print Problems
Blurry prints and double edges
A blurred or doubled edge often means the screen is not snapping off the garment cleanly, so check off contact first. Low mesh tension and a loose frame in the clamp can cause the same symptom. The registration guide covers press setup.
Colors out of register
Misregistration usually comes from screens that are not clamped square, missing or misused registration marks, or a set of screens with uneven tension. Compare tension across every screen in the job before you chase micro adjustments. Full steps live in Screen Printing Registration Marks and Multi-Color Alignment.
Ink bleeding past the design
Bleeding is commonly caused by ink that is too thin, material trapped under the stencil near the image edge, poor off contact or mesh that is too coarse for fine detail. Clean the underside of the screen and check ink body first. See Screen Print Ink Bleeding: Causes and Fixes. Mesh choice belongs on the mesh count chart.
Ink and Cure Problems
Cracking or washing out after laundering
The most common cause of a print that cracks in the wash is undercure. Stretch a cooled print: cracking or crumbling points to undercure, and thick deposits cure more slowly than thin ones. Dryer settings alone do not prove the ink film reached cure, so follow the tests in How to Cure Plastisol Ink.
Ink choice and handling
Some problems start with the ink system itself, such as a plastisol that has been over reduced with an additive that does not cure. If you are switching systems, compare them in Plastisol vs Water Based Ink and follow the ink maker's technical data sheet.
Weak white on dark garments
A white that looks gray or uneven on dark shirts is usually an underbase, flash or deposit issue rather than a bad ink. White Underbase Screen Printing covers opacity and flash.
Garment Problems
Color shift on polyester
Dye from polyester garments can migrate into light colored inks under heat, and the color change can show up hours or even days after printing. Low bleed inks and testing each garment style and dye lot help. See Dye Migration on Polyester and Screen Printing on Polyester.
Test before the full run
Fabric can vary from one dye lot to another, so print, cure and check a test piece from the actual garments before running the order. Record what you changed so the fix is repeatable on the next job.
Frequently Asked Questions About Screen Printing Troubleshooting (FAQ)
Why is my screen print blurry?
Check off contact first, then mesh tension and whether the frame is tight in the clamp. A screen that does not lift cleanly from the shirt smears the edges.
Why is my print cracking after washing?
Undercure is the usual cause, especially on thick deposits. Run a stretch test on a cooled print and follow the cure guide.
Why are there spots in my print?
Spots outside the design usually come from pinholes in the stencil, caused by dust, bubbles or underexposure. Spot out the screen with blockout for the current run and fix the screen making step for the next one.
Why won't my colors line up?
Look at screen squareness, registration marks and uneven tension across the screen set before adjusting the press.
Why is the ink changing color on polyester?
That is dye migration: the fabric dye moves into the ink with heat. Use a low bleed system and test the garment lot first.
Figures and methods here are hedged starting points that vary by product; confirm every setting against the supplier or manufacturer spec sheet. Every ink, emulsion and garment behaves a little differently; the linked guides give ranges, and the maker's data sheet decides.
Browse more guides in the DAX Learning Hub, and check cities and dates on the DAX show schedule when you are ready to see screen printing equipment and supplies with suppliers in person.