Cracking the Code on Difficult Fabrics: Screen Printing, Heat Printing, and Embroidery Tips

Every printer knows the feeling: a job that initially looks straightforward but turns unpredictable the moment ink hits the substrate.

In apparel decoration, variability is the rule, not the exception. From fiber content and fabric construction to dye chemistry and finishing treatments (not to mention the fact that apparel isn’t a rigid substrate), even subtle differences impact the final outcome.

Yet some substrates introduce a level of complexity that goes beyond normal process control — requiring adjusted expectations, specialized techniques, and a deeper understanding of material behavior. For suppliers who both source and decorate blanks, these difficult substrates present both risk and opportunity.

Luckily, with the right training, continued education, and attention to detail, even the most difficult fabrics can be decorated with beautiful results.

The Complexity of Fabric

Talk to anyone who’s decorated apparel even just a handful of times, and they will list the following as the most difficult to decorate regardless of technology:

Among the most difficult fabrics to decorate are performance garments. Problems like scorching often lead to decoration failure. | Credit: STAHLS’

• Anything stretchy such as spandex
  
• Performance polyester/technical fabrics
  
• Tri-blends
  
• Fleece or other highly-textured garments
  
• Delicate fabrics such as silk
  

While physical features like slippery silk and high textures can be problematic, Lizzy Riedy, heat printing educator, webinar host for STAHLS’ and Transfer Express, and STAHLS’ Pro Day educational series presenter, notes that it’s more complicated than that. “What makes these difficult isn’t just the fiber — it’s the dyes, coatings, and finishes,” she explains. “Those variables determine whether you’ll run into issues like dye migration, scorching, or poor adhesion.”

Riedy feels that there are a few fabrics that rise above the rest when it comes to difficulty. “Sublimated polyester and coated nylon are among the most challenging because they combine multiple risk factors — heat sensitivity, dye migration, and adhesion issues,” she says. “It’s less about avoiding fabrics and more about understanding the risks and using the right materials while setting expectations with the customer.”

When it comes to working with the customer, Joe Kramar (Appliqué Joe), lead embroidery R&D specialist, https://www.lonerockclothing.com/, points out that often these projects fail because of a problem during the sales process. “When I was just [beginning], I learned a hard truth: Every time I found myself backed into a corner, staring down a ruined garment on the machine that was simply never going to work, it was because I had surrendered my authority [to the customer],” he says.

If we’re talking embroidery, Breanna Woicekowski-Wiener, senior merchandiser for promotional apparel supplier Vantage Apparel, notes that high-pile fleece garments are also equally difficult. Not only is it fairly limited to embroidery and screen printing (depending on the blank), but even those can be challenging. “[For] something like a high pile, when you're embroidering on that, depending on the stitch count, the embroidery can feel lost in the fabric,” she explains.

Challenges also arise when decorators approach these fabrics with a one-size-fits-all mentality. Expecting them to perform like everything else will lead to problems. “You have to stop treating a $60 technical garment like a cheap promotional T-shirt,” Kramar emphasizes. “The ultimate best practice is controlling your variables.”

Performance and high-pile fabrics can be a little trickier to manage when it comes to embroidery. | Credit: Vantage Apparel

Technology Breakout: How to Determine What’s Best for Each Fabric

All of that can feel overwhelming, and might even lead to some decorators simply saying “no” to all orders for high-stretch performance wear of luxury fleece. Depending on your equipment setup and team expertise, that might be the way to go. In doing so, however, you will turn away a lot of potentially high profit opportunities.

So where to start? Lon Winters, founder of Graphic Elephants, explains that because of the multitude of factors that make these garments difficult, testing is crucial. “Test unfamiliar fabrics and ink for bleed, adhesion, and stretch,” he recommends. He adds that decorators must keep “a lot of tools in the toolbox” if there’s any shot at success.

Let’s look at screen printing. Winters explains there are plenty of tactics to employ when working with difficult substrates. The process begins at the sales counter, but there are also some pre-press considerations to make, such as proper mesh and stencil selection. “If you control the screen, then and only then do you have a chance to control the process,” Winters believes. “[If you] don’t control the screen, you have no chance to control the process.”

In addition to the aforementioned testing, he says there are some shop accessories to keep on hand during the actual printing process. “Silicone inks are useful on smooth poly and digital camo [as well as] compression fabrics,” he says. “Bleed blockers should be used when appropriate. Low-bleed and low-cure inks should be used to help resist bleed.”

There are also some adjustments that can be made in the temperature department. Winters suggests keeping temps down on flashes and dryers, and never stacking these difficult garments while hot. Woicekowski-Wiener notes that problems can also arise when it comes to loading the platens. Jackets with inner linings or slippery fabrics need to be stabilized.

Beyond that, understanding when screen printing may not be right for the garment at hand is also paramount. “Go to a transfer application if it makes more sense for a particular fabric,” Winters advises.

If you are moving to the transfer arena, Riedy has plenty of advice to share. She shares the sentiment that you must control the variables. “When heat printing, focus on controlling all variables: time, temperature, and especially pressure,” she says. “Following methods like the ARCH Method helps reduce scorching by dialing in those settings.”

And like screen printing, the proper preparations are essential to success with difficult fabrics. “Match the transfer to the fabric,” Riedy emphasizes. “For example, using low-temp transfers for tri-blends or dye-blocking materials for polyester is far more effective than trying to force one solution across every garment.”

Here are a few matches she recommends:

• Tri-blends: low-temp solutions or stretch HTV
  
• Nylon: low-temp solutions
  
• Sublimated polyester: blocker technologies or silicone-based solutions
  

Coupled with matching the right transfer to the garment, Riedy mentions you must also pre-press garments, document your settings, and stay consistent.

When it comes to embroidery, tough-to-work-with garments become a whole different beast for other reasons. Kramar notes the most challenging are ultra-lightweight, high-stretch modal, bamboo blends, and extreme performance fabrics. Each of these is incredibly unstable, or as Kramar puts it, “It’s like trying to build a skyscraper on a mattress. The fabric simply cannot take a ton of needle penetrations without being destroyed.”

Still, there are a few things suppliers can try to avoid embroidery challenges. Woicekowski-Wiener says that it starts with the sales and art process. All details must be gathered from the customer then delivered to the art team before you even move to production. “When we are setting up logos that are going into our art department,” she says, “we do commonly let them know what garments they are going on.”

While you can’t always control the fabric, you can control the design and the setup. “You cannot change the fabric, so you must control the physics of the hoop,” Kramar believes. “I look at this as a ‘Success Stack,’ where every small element adds a vital percentage to the overall success of the project. Cherry-picking or skipping any percentage point equals a ruined garment.”

To start with, he suggests using a light, targeted application of temporary spray adhesive or a fabric glue stick to baste the garment to your stabilizer before hooping. “This creates a ‘Friction Lock’ that accounts for a critical 10% of your success,” he says.

When working with tough fabrics, controlling variables like the hooping process can help when it comes to the embroidery process. | Credit: Joe Kramar

You must also evaluate whether you have the right needle (another 15% of the Success Stack). Kramar recommends ball points for knits to part the fibers, and sharps for tough wovens with buckram. It’s also important to make sure you’re working with newer, fresher needles.

Finally, he points to every embroiderer’s nemesis as 20%: digitizing. “You must open up your stitch density — let the fabric breathe,” Kramar says. “Build an architectural underlay that maps the stretch of the garment, and make sure the overall stitch file is designed to float with the fabric rather than choking it out.”

Evaluating everything from the substrate shape itself to where the embellishment will be placed is crucial when working with difficult fabrics. | Credit: Joe Kramar

Price Appropriately

Regardless of which decorating technology you’ve selected for the difficult fabric, all sources point to setting yourself up as the expert. “It’s our job to get it done,” Winters says.

Considering the initial sales interaction, as well as the entire production process, there’s still one more element to success: pricing. Difficult-to-decorate fabrics take more time, are often more expensive, and present higher fail risks. That translates to charging the customer appropriately.

“Set expectations early,” Riedy suggests. “Explain that performance fabrics and outerwear require specialized decoration methods and may have limitations. Talk through risks like dye migration or scorching, but also position solutions — like low-temp transfers for tri-blends or dye-blocking transfers for polyester.”

When you pose solutions, Kramar notes, you automatically set yourself apart, and that builds trust even when you say no to an order. “If a client wants a 100,000-stitch solid fill logo on a paper-thin performance polo, you have to look them in the eye and tell them no,” he cites as an example. “Explain the mechanics — that heavy needle penetrations will ruin the drape of their luxury garment. … Then, pivot them to a premium appliqué, TPU, or HD transfer option to maintain that high-end aesthetic without destroying the piece. You must manage the expectation before the purchase order is ever sent.”

Woicekowski-Wiener explains that you must also understand expectations. “What exactly is the customer looking for: Is it a specific type of garment or a specific type of deco?” she poses. “It's also important to know the end use of the garments — are people running marathons in these or are they just wearing them to their office meetings?”

At the end of the day, dealing with difficult fabrics is, indeed, difficult. Suppliers that confidently prepare, train, and have the right conversations with their customers will succeed not only in these orders, but the repeat business they’ll acquire because they’ve set themselves up as the trusted experts.