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The Indian Motorcycle applique was printed with an HP latex inkjet printer.
If you have a solvent, ecosolvent or latex inkjet printer, you can decorate t-shirts, jackets and jerseys with colorful graphics and corporate logos using RTape Tatoo, printable polyurethane heat transfer films. Selling printed appliques to your existing customer base is a great way to increase your shop’s sales at high profit margins without a lot of effort. The manufacturing process is not very complicated, so there is not much to learn. And the only additional equipment that you will need for your shop is a heat press. (If you don’t own a heat press, you should read my story Shopping for a Heat Press.)
Tatoo films are our most popular printable heat press films. While the Tatoo brand is comprised of several different products, the basic construction for all of these films is the same. Tatoo consists of a printable white film coated with a heat-activated adhesive on a clear polyester carrier. This product construction is very similar to printable pressure-sensitive vinyl media. The adhesives are different. And Tatoo uses a clear film carrier not a siliconized paper release liner.
Printable Polyurethane versus Vinyl. Tatoo is polyurethane not a vinyl. Polyurethane is a much better grade of material. It will hold up in the laundry much longer, whereas vinyl can crack after a few washes. Polyurethane is also much thinner, so the Tatoo applique won’t feel like wearing a plastic placard. Polyurethane is also more stretchable. When the garment stretches, the polyurethane applique will stretch with it. That’s an especially important feature for any applications to the stretchable performance fabrics. All the way around, the Tatoo is a better product.
After you design your graphics, always perform a test cut prior to production. Tatoo films are very easy to cut and weed. You will probably need to make a few minor adjustments, such as downforce pressure and cutting speed. For more information on plotter cutting polyurethane heat transfer films, read the article, Plotter Cutting Heat Transfer Films. In checking the test cut, the blade should only very lightly score the polyester film carrier. If you can feel where the blade has cut into the carrier on the backside of the film, you have cut too deeply.
Printing tips. When digitally printing Tatoo heat transfer polyurethane films, a generic ‘heat transfer media’ profile will generally provide acceptable color reproduction. Make sure that you print on the polyurethane film and not on the polyester carrier. Both sides of the film are very similar in appearance. The polyurethane side of the films has a matte finish. The carrier has a smoother finish. If you are still confused which side is which, scrape a corner of the film with an Xacto® blade. The white polyurethane film is very thin and stretchable. The thicker polyester carrier is clear and will not stretch at all. Also when you are printing on the film, print “right reading”.
Some ink systems take a while to dry completely. While a print may feel dry to the touch, any ink may take can take an additional ten minutes to a half hour to fully outgas. If the ink does not cure completely, the masking used to transfer the applique may not stick sufficiently.
Weeding and Masking. After printing and cutting your graphics, weed or remove the excess material from around the printed design. Then, mask the printed graphic using a medium tack hot mask transfer tape. While many sign makers have used paper application tape to transfer printed heat transfer appliques, you are much better off using the right product for the application. The problem that I have with using paper application tape is that it is paper. And paper can tear, especially on larger appliques. This can slow down production.
To mask the printed Tatoo films, we have developed a medium tack transfer tape called HM350 HotMask™. First lightly squeegee the masking over the top of the printed graphic to removing the large air bubbles. Many people find it easier to begin squeegeeing the masking from the center and working their way outwards. After the masking is initially secured, resqueegee the masking with firm pressure. Place the masked graphic to the side and allow the adhesion to build for fifteen to thirty minutes. This waiting period is important, especially with ecosolvent inks, which can take a while to cure.
In most cases, you will print several appliques on the same sheet. After the printed graphic is masked, you can cut the sheet apart to separate the individual appliques. You can leave the masking on the graphic in storage until you are ready to apply the appliques to garment. After the adhesive builds to the optimal adhesion, it will not continue to build.
Time, Temperature and Pressure. Heating pressing appliques is not rocket science. It does, however, require than you read the instructions provided by the manufacturer of the heat transfer material. Products from different manufacturers or different product series from the same manufacturer will heat press at different temperatures for different amounts of time at different pressure settings. I also recommend that you read my story Pressing Heat Transfer Films.
The Tatoo printable polyurethane films are available in four versions: Tatoo, Tatoo Nylon for nylon and coated fabrics, Tatoo SubliBlock with an anti-migration layer, and Tatoo Pearl, which is a beautiful pearlescent white. Tatoo and Tatoo Pearl heat press at 330°F (165°C) for 17 seconds at medium to high pressure. Tatoo Nylon heat presses at 240°F (115°C) for 15 seconds at medium to high pressure. Tatoo SubliBlock heat presses at 240°F (115°C) for 17 seconds at medium to high pressure.
Every product is different. Read the manufacturer’s instructions before heat pressing appliques. Set the controls on the heat to the recommended settings.
Pre-press procedure. Before heat pressing an applique to a shirt, always pre-press the garment. Pre-pressing the garment drives out any moisture in the fabric. The pre-pressing will also cause the fabric to pre-shrink. It’s better that if the garment shrinks, it shrinks before you apply the graphic. Most importantly, pre-pressing presses out any wrinkles, so you have a smooth surface to work on. Wrinkles in the fabric can result in wrinkles in the applied graphic.
Transferring Printed Heat Transfer Films. To transfer the printed graphic from the carrier, turn the masked applique over so the carrier is on the top. Then remove the carrier from the graphic, rather than trying to lift the graphic off of the carrier with the masking.
Remove the carrier from the graphic, rather than trying to lift the graphic off of the carrier with the masking.
Heat Pressing. After positioning the graphic on the garment, press the applique at the time, temperature and pressure, specified by the manufacturer. During the heat press process the Hotmask™ protects the surface of printed heat transfer material from heat related discoloration or any other damage. The polyester (PET) film of the HotMask™ withstands heat cycles as long as 60 seconds at 166°C (330° F).
Removal of the HotMask™. After heat pressing, remove the graphic from the heat press and wait three to five seconds before removing the masking. With a warm removal, HotMask™ should come off cleanly and easily with no adhesive residue. The masking will also remove in a cold peel, but it removes easier warm. Whether you remove the masking warm or cold, it removes in one piece, not in little bits and pieces, so you can use it over and over again. I have used it as many as six times.
HotMask™ removes easily in a warm peel. It can also be removed cold.
Garment Care. If you clean garments decorated with heat transfer films according to the manufacturer’s instructions, printed polyurethane appliques should last the life of the garment. You cannot control how your customers will care for the products that you deliver to them. The best you can do is to provide them with some guidance. Caring for Garments with Heat Transfers explains the dos and don’ts when of washing and drying.
Labels: digital printing, garment care, garment decorating, heat press, heat transfer films