![]() In the light areas in the negative file no invisible ink is applied on. This ink glows white when ultraviolet lights shines on it. When printing this negative picture using our Octopus FluidsĀ® invisible printer inks the dark areas in the negative are printing by the black inkjet cartridge which is filled with the white invisible ink. And on the opposite formerly dark areas (arrow 3) are in light color in the negative (arrow 4). ![]() Light colored fonts in the original version of the picture (arrow 1) now are in dark colors (arrow 2). When comparing the original image file to the negative version the most obvious detail is that the light areas in the picture have been converted to dark colors. ![]() Therefore here is a bit more background information for explanation. We want You to understand why these settings are necessary. ![]()
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