When I first found this piece with our vintage charts, the print geek in me got excited!
In 1979, Omnigraphics created a Professional Color Slide Chart. This clever plastic chart illustrated how to create duo-tone and black photos with color combinations. It also presented how CMYK is used to create a final full-color photo. It even had an area where you could insert a color chip to see how a black image would print on that particular color.
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