November '15

For the Business of Apparel Decorating

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Page 55 of 102

Workwear can vary greatly from safety re- flective vests, to high-visibil- ity sweatshirts to nylon jack- ets. (All images courtesy ICC) 2 0 1 5 N O V E M B E R P R I N T W E A R || 51 2 0 1 5 N O V E M B E R P R I N T W E A R || 51 soak up the heat in your dryer and prevent the ink from reaching the proper cure tem- perature. If you are running more than one press but using only one dryer, try and run similar materials together to minimize cure issues. Since the heavier fabric may require a longer dwell time and higher temperatures, running a heavyweight work shirt and a lightweight white T-shirt down the same oven chamber at the same time can lead to under-cure or scorching. Remember, the ink on a work shirt is meant to be seen. Always use the mesh count recommended by the ink manufac- turer to get the proper ink lay-down and appearance that the customer wants and ex- pects. On uniforms and work shirts, you are looking for a visible and long lasting print, not a soft feel with low visibility. Pay atten- tion to emulsion coating, mesh count, and cure temperature to create a highly visible and long-lasting print. OUTDOOR CLOTHING Outdoor workwear usually consists of dif- ferent jacket styles or sweatshirts. Most sweats worn as workwear are usually 50/50 or 100 percent polyester. The 100 percent polyester helps repel moisture and is usu- ally more comfortable and lighter to wear during a full workday. For 50/50 sweats, a good low-bleed ink printed through the proper mesh count and with just enough pressure to lay the ink on top of the gar- ment should do the job and exhibit a visi- ble, long-lasting print. As always, the proper emulsion coating and cure temperature will go a long way in creating a durable print. The 100 percent polyester garment will present some unique challenges. When printing on 100 percent polyester gar- ments, the biggest issue will be bleed; aka dye migration. Bleed occurs when the polyester dyes release from the fibers and travel through the ink film. This causes the ink film to show the color of the dyes. The bleed issue is usually very pronounced on maroon and red colored garments, but it can happen with any colored garment. Note that the darker the garment color and the lighter the ink color, the more no- ticeable it is. What makes polyester bleed is the heat re- quired to cure standard plastisol inks. Heat causes the dye to release from the polyester fibers and migrate through the ink film to appear on the top layer of ink. A good low- ‚óŹ Beginner

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