November '15

For the Business of Apparel Decorating

Issue link:

Contents of this Issue


Page 56 of 102

52 || P R I N T W E A R N O V E M B E R 2 0 1 5 bleed ink can often stop this dye migration before it reaches the top of the ink surface and turns the ink to the color of the gar- ment. Remember, the ink needs to migrate completely through the ink film for it to turn colors. This can take 24-plus hours to completely occur so a test print the day be- fore starting production is recommended. Yes, this is not always easy to do, but on any suspect garments it is more cost effective to do the test than replace the shirts and print them all over again. Other types of outdoor workwear include work jackets. Most jackets are either nylon, polyester, or some form of cotton or canvas. Polyester jackets require the same steps and precautions as polyester sweats do to min- imize bleeding. Nylon jackets use basically three different types of weaves: taffeta, ox- ford, and satin. The taffeta weave is a plain weave where the yarns alternately pass over and under each other. The oxford weave is a basket weave of two threads over and two threads under. The satin weave is a weave that produces a very lustrous fabric and is used to make satin jackets. When printing on nylon jackets, an ink specifically designed for the fabric is always the best choice. Most inks designed for ny- lon are a two-part system that uses some sort of adhesion promoter or catalyst that will give the necessary adhesion and abra- sion resistance needed for outdoor jackets being worn day in and out. As always, fol- low all the manufacturers' recommenda- tions on mesh counts and the amount of catalyst or adhesion promoter to be added. Weigh the components to avoid any failures after printing. Some jackets can have a water-repellent coating that will potentially become an issue when printed on. The coating is designed to help water from saturating the garment, but if it is so good that it is blocking the water from penetrating the garment, it will also inhibit the ink from bonding correctly to the jacket. If the ink is not bonding correct- ly, the abrasion resistance and adhesion will be compromised. To check for a water-repellent finish, pour a small cup of water on the garment. If it beads up and does not soak in after a few minutes, you could have an adhesion issue. Wiping the print area with isopropyl alco- hol can help remove some of the coating and allow you to get better adhesion. SAFETY WORKWEAR In today's safety-minded workforce, more and more emphasis is being put on high-visibility clothing. Standard high-vis- ibility yellow and orange work shirts are mostly cotton or polyester. You'll note that most workwear in the marketplace—and other garments for that matter—are made of polyester. As such, it is time to learn how Left: The small detail here is printed with reflective ink to enhance visibility Above: Reflective inks are popular for safety garments, however, these inks will not meet government specifications. WORKWEAR DECORATION

Articles in this issue

view archives of Printwear - November '15