October '19

For the Business of Apparel Decorating

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2 0 1 9 O C T O B E R P R I N T W E A R 4 5 white underbase and faded colors in the CMYK layer. Fortunately, this can be overcome with a little practice and by following these steps: 1. Pretreat twice. The first time, use about 25% of your normal pretreatment amount. Cure at 335 degrees F using no pressure in 15 second intervals until dry. When the garment has cooled, pretreat again using the normal amount of pre- treatment. Cure again at 335 degrees F using no pressure in 15 second intervals until dry. 2. Place a piece of tearaway backing or similar material inside the shirt under the area to be printed. 3. In the RIP software, set the white to no higher than 50% coverage and set the resolution to 1,440 X 720. You may also need to increase the choke setting on the white to prevent bleeding. 4. Set the white underbase for two passes. The goal is good coverage with- out being oversaturated. Allow at least 30 seconds between passes. 5. Set the color layer to 720 X 720 resolution. Repeat once if necessary for richer color and coverage without being oversaturated. Allow at least 30 seconds between passes. 6. Cure using a hover heat press. Do not use pressure. Pressure and heat will cause the polyester's dye to bleed through the ink. Hover for 30 to 45 sec- onds then press for 15 to 20 seconds using zero pressure. You may also achieve good results using a flash dryer or tunnel dryer. Bright-colored shirts may show slight dis- coloration, but it should be very minimal. If you see substantial discoloration, check your heat press' calibration and/or try a dif- ferent brand of pretreatment. JERRY SMITH, MESA SUPPLIES INC. When you are designing artwork that will be printed with a digital direct-to-substrate printer, what are most important things to keep in mind? The two most important factors are resolu- tion and color. When designing for DTG, you can use vector or raster files easily. I recommend raster because of the printer's technology. Vector files are usually flat color and do not show off the strengths of the printer. Raster artwork (photos, high-end stock art) gives you the ability to print any- thing. Direct-to-substrate machines are col- or printers, so take advantage of that. Use their strengths because not all decorating technologies allow for this. DANE CLEMENT, GREAT DANE GRAPHICS Do I have to pretreat a light- colored shirt when doing direct- to-garment printing? It all depends on your design. Ash gray and some pastels shirts may not need to be pretreated. You will have to play around with your design to see the result and to get a feel for what the colors will look like without the pretreatment. The colors of the ink (CMYK) can take on the color of the shirt. For example, yellow ink on a red shirt could be the color of orange you want in the design. DARCI JEFFREY-ANDERSEN, COASTAL BUSINESS SUPPLY Why do I need to pretreat a dark- colored shirt when working with a direct-to-garment printer? Pretreatment puts a barrier over the fabric allowing the white ink to set on top of it. Even if your design does not have white in it, the white acts as an underbase, allowing the colors of the design to look richer in col- or. If you choose not to pretreat the fabric, the white ink will disappear into the fabric after it is put down. DARCI JEFFREY-ANDERSEN, COASTAL BUSINESS SUPPLIES PW Want more answers? Check out Printwear's Q&A online, updated regularly: * * GET YOURS AT GET YOURS AT PW1019 | 800.478.2457 ijklmn INTRODUCING THE HOTRONIX ® 360 IQ ™ HAT PRESS THE ONLY HAT PRESS YOU'LL EVER NEED Successfully print on all sides of a hat without removing it or changing out platens. This one-size-fits-all press eliminates crease lines, and a heated lower platen makes it the perfect solution for applying emblems, appliqué, and patches. Best of all, it comes equipped with advanced IQ ® technology allowing you to track your business in real time.

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