What is Second Surface printing?
It is A quick and easy way to add visual dimension to printed projects is to separate your design and print the background image on the second surface (back side) of a clear piece of substrate and then print the “foreground” graphic on the first surface (top surface). To print the background image on the second surface, flip the background graphic image to appear “backwards.” When printing the background image, reverse the ink layering order to have color inks (CMYK) print first, then the white inks print second. This can be done all in one printing pass. Once the back surface is printed, flip the substrate over and print the “foreground” graphic on the first surface. This technique will create an impressive 3D look, making the first surface graphic appear as if it is almost “floating” over top of the second surface background image.
Advantages of Second Surface Printing:
Second surface printing has many benefits and the main advantage is the clear material substrate acts as a barrier and protects the image from wear and tear. Whether the application is a window graphic, floor decal, or overlay membrane graphic, the printing is typically done on the backside of a clear material (2nd surface) so that the ink is not exposed to the elements. This extra layer of protection can add years of life without the cost of an additional laminate.

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