Single Process Printing Versus Double Process Printing

Zazzle uses a DTG (Direct-to-Garment) printing process to produce each shirt.

Classic Printing: No Underbase  (Single Process Printing): Any white used in the design will come across as transparent allowing the colour of the fabric to show through.

Vivid Printing: White Underbase (Double Process Printing): Apparel has an upcharge due to the extra process of printing a base layer of white ink under the design to make it more vibrant.

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Even though the design is the same in all three shirts, note the colour differences in Cookie Monster's face. In the two light apparel t-shirts (white and pink), no white is actually printed in those designs (classic printing) and so you're seeing the fabric's colour filling in Cookie Monster's face. In the dark blue t-shirt, you're seeing the undercoat of white that was initially added to make the design more vibrant (vivid printing).

Learn more about Designing for Vivid Printing.