Printwear

Recognized Supplier Guide ‘18

For the Business of Apparel Decorating

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40 || P RI N T W E A R O C T O B E R 2 01 8 tended speci cally for this application. The rst zone should be intensely hot, sending the ink te mperature to a boiling point with- in only several inches of conveyor travel. This allo ws the second zone to hold the ink at the opti mu m boiling point over a corre- spondingly longer a mount of ti me, signi - cantly reducing the total ti me needed for the coating to reach 300 to 330 degrees F. This allo ws for maxi mizing of conveyor belt speeds and output for any water-based tex- tile screen printed or D2 printed products. MARK VASILANTONE, VASTEX INTERNATIONAL When working with screen printing stencils and scumming or haze oc- curs from an incomplete washout and/or under exposed stencil (any type of stencil), how do I x the problem? Increase the exposure and/or washout un- til foa ming stops. Use a wet vac to suck out the water and scu m. This is a major, co m mon proble m. MICK ORR, CHROMALINE SCREEN PRINT PRODUCTS What advantages does an LED unit offer over metal halide? The bulbs on LE Ds will last in the neigh - borhood of 50,000 hours with no notice- able light degradation. The light is as good on the rst second as it is at the end of its life. Additionally, LE Ds use very little po wer co mpared to metal halide. When using an LE D, you might be looking at 5 or 6 a mps per usage as co mpared to 12 a mps with metal halide. LE Ds are instant on and instant off, while a metal halide unit has to war m up before it is fully functional. No po wer is consu med bet ween each usage, and there is no wait ti me. This also lessens its overall po wer consu mption. If you use a dual-cure e mulsion, a metal halide provides a sharper i mage than an LE D. Ho wever, unless your shop prints highly detailed art work, this additional quality may be overkill. An LE D unit is best used for short, fast runs when you are doing a lot of set ups and teardo wns. An LE D paired with a photo poly mer may be faster than a metal halide when doing this type of work. JON BENEDICK, WORKHORSE PRODUCTS What does a brand-speci c ash-cure unit offer over a generic type? When you purchase a ash cure that is designed to work with a speci c brand of screen- printing press —and most, if not all, press manufacturers offer one — what you get is ti me savings and more control. When a brand-speci c ash is plugged in, the onboard co mputer i m mediately recognizes it is there, and it turns off that head. When using a universal ash, you must manually turn off the head. If you forget and start the press, the print head could run into the ash-cure unit. Another advantage of a brand-speci c ash is the ability to control one or more ash-cure units fro m one control panel. You can set te mperature, d well ti me, and other controls with- out moving fro m the sa me spot. The brand-speci c ash-cure unit is less expensive than a universal, which requires a photo cell to detect motion and to kno w when to turn the ash on and off. One advantage a universal ash offers is the ability to use it with an auto matic and a manual press. PAUL SCHMIDT, WORKHORSE PRODUCTS How can I prevent screen printing ink dye migration? Reducing dryer te mperature is key to preventing heat-related defects, but printers must be equipped with lo w curing screen printing ink syste ms that help to prevent discoloration resulting fro m ink dye migration. These syste ms are usually designed to cure bet ween 260 degrees F and 280 degrees F to maxi mize bleed resistance and mini mize fabric distortion. RAY SMITH, POLYONE CORPORATION

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