January '19

For the Business of Apparel Decorating

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2 0 1 9 J A N U A R Y P R I N T W E A R 6 7 I want to focus on printing both with and without white ink on 100 percent cotton. I'll also give you a summary of other types of pretreat- ment and substrates. When printing with white ink, the vast majority of pre- treatment used has three key ingredients: salt, glue, and water. The salt will allow the white ink to sit on the surface. Glue mattes down the fibers for a smooth print and the water is the carrier to dilute to the correct concentration. When talking about D2 printing, I'd like to rephrase the original question to, "Do I have to pretreat when using white ink?" The answer is always a definitive yes. I believe the better question, and one I have been asked multiple times as well is, "When do I need to print with white ink?" My an- swer is always when you need to keep the integrity of your color. To clarify these statements, if you are printing black ink on a red shirt, black is dominant. It will stand out, negating the need for a white ink underbase. But, if you are printing green on red fabric, D2 inks are translucent in color so your green on red will appear brown. Printing a white underbase retains the in- tegrity of your intended color. For instance, when printing a photograph, if your gar- ment is not white, expect a color shift to occur. Printing a white underbase would avoid the color shift, but if the shirt color is light enough, it may still be acceptable. One quick way to find this out is to open your image in a program like Photoshop. You'll create a layer underneath your im- age that resembles the color of your shirt. Then, change the image layer property from "Normal" to "Multiply." You'll be able to see what your image looks like without white ink. THE DIFFERENCE A PRETREAT MAKES You may have heard people talking about pretreating 100 percent cotton garments when not using white ink. In times past, this was an unheard of concept. Why go through the pretreating process if you don't have to? This was my position on it for many years, even though I knew the print the surface of the garment and not bleed into itself. If you do not pretreat light gar- ments, the cotton will absorb the ink and create more of a mottled effect. This will tend to shift your color to a different hue as well as bleed into other colors. Light garment pretreatment will brighten your colors and darken your blacks. It will quality was better. But, over time, I began to transition over to team pretreat. The main reason for my transi- tion was for retaining the in- tegrity of the colors. A light garment pretreat- ment allows the ink to sit on A next-generation DTG printer built for speed, versatility and value SEE IT IN ACTION AT CES Las Vegas, January 8 - 11 ISS Long Beach, January 18 - 20 A next-generation DTG printer built for speed, versatility and value INTRODUCING THE NEW RICOH Ri 1000 Call for a Free T-Shirt Sample Today! Start Printing Tomorrow. 855.863.1638 Professional-Level Performance at an Affordable Price The RICOH Ri 1000 features: • Fast, high-res printing up to 1200 x 1200 dpi • Highly automated maintenance • Magnetized quick-change platens • Built-In Interactive Operation Guide Do I have to pretreat?" It depends.

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