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In general, backlit images are meant to be viewed only when a light source is behind the image. Occasionally, however you may need to create a backlit image that can be viewed when face-lit with natural light in the daytime, and also at night when the image is illuminated from behind. The problem is that a print that looks good when backlit needs to be have a heavy ink load. It needs to be dark and dense to compensate for strong backlighting. But that same print will look terrible in a front-lit application. Here are some tips to get around the problem.
The type of printer, inks and media being used also makes a radical difference in the appearance of the final print. Laser-based digital photo imagers have the most scope for adjustment. Prints from these machines tend to have the most brilliant backlit qualities. They can easily be adjusted to almost any density and color range, but are not perfect. The prints fade rapidly, are not water-resistant and can be expensive.
Dye-based aqueous inkjet inks look good and are inexpensive, but they tend to fade rapidly and are not waterproof. Pigment-based aqueous don’t fade, but also are not waterproof. Solvent inkjet inks are inexpensive, waterproof and much more fade resistant. Each type and brand of printing media and laminate will also give prints a unique color cast. Different applications will need different usage of each of these processes and media.