October '14

For the Business of Apparel Decorating

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20 1 4 O ctO b e r Printwear | 8 9 good light sources are required. Each light source has different composition of wavelengths, which greatly affects the colors' appearance. Finally, the color specialist should also consider the final application as you may have to adjust colors to fit individual jobs. To achieve optimal col- or, consider prepress and on-press parameters, such as emulsion thickness and mesh counts. Yixin Yang, Wilflex The edges of my printed images are saw toothed or ragged. Why? There are several possible causes. A coarse mesh, like 83, can result in an irregular line in the print. Also, with textured gar- ments, like piqué, the ink follows the texture of the garment and appears irregular. Shops that use a lot of pressure washing on screens can damage the edges of the image. When using coarse mesh or printing on textured garments, use a capillary film rather than liquid emulsion. In any case, power washers are not necessary. Emulsion comes out of a screen easily after water fully absorbs into the image, causing the image to swell with water. RogeR Jennings, R Jennings Mfg. Co. How can I prevent ink transfer when stack- ing shirts off the dryer? Stacking shirts acts as a heat insulate, and when heat is combined with certain dyes, moisture, and an under-cured ink film, these con- ditions can create potential to "ghost" or transfer ink or dye. When printing over-dyed shirts, use a three-stack cooling station while unloading garments. A three-stack approach to unloading shirts allows the garments to cool and min- imizes the potential to ghost, which sometimes occurs when printing with a nonperoxide, bleed-resistant ink. nanCY BRoWn, Wilflex How many colors do I need on my press? The average printing job is one to three col- ors, but there are several advantages to getting a press with more than four colors. Being able to keep a one- or two-color job setup for a short period of time after delivery is good for those cases of "Oops, I need three more mediums." A popular multi-color process uses the four basic colors: cyan, magenta, yellow, and black. If you're printing this process on anything but a white shirt, you need a fifth color, white, as your under-base. When shopping for equip- ment, keep in mind that some presses, like the one shown, can be upgraded with additional color heads at a later date. MaRk Vasilantone, Vastex inteRnational pw SCREEN PRINTING consider how many colors you typically use in a job to help determine the amount of print stations you need. (Image courtesy Vastex International) to create the cleanest graphics, avoid using coarse mesh. (Image courtesy Graphicele- ThE 2014 Q&A TRoublEShooTING GuIdE

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