After a few weeks winter break it’s time to get back to gum printing!

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This picture was one of my test images when trying the curves introduced in the previous gum printing post. The picture was taken with a Nikon D70, it is a RAW file, and has been slightly processed by increasing color saturation and vignetting the corners a bit. Cyanotype was used as the cyan layer.

Color separation was made by splitting RGB channels into three separate grayscale images. A correction curve created by ChartThrob was applied to each image. The images were then inverted to negatives and printed on CopyJet transparency. The negative from R channel was printed in cyanotype, B in gum bichromate with yellow pigment, and G with magenta pigment, in this order.

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The three separation negatives.

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The first two print layers: Cyanotype and Cadmium Yellow.

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Jalo Porkkala: Samos Wall, tri-color gum / cyanotype.

Magenta as the topmost layer.

The outcome is a bit powerless and muddy – color balance and saturation are not quite there yet – the Maimeri pigments chosen may not be the most adequate ones for the job. Also printing each color layer twice could yield better color depth.