Tricolor Cyanotype Simulator

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Source

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Image prep

Saturation 150

Handout: magenta & yellow layers are bleached and toned (madder root / medlar leaf); the blue cyanotype is printed last and left un-bleached. The yellow negative gets 2× the exposure. Turn off the magenta layer for a blue + yellow duotone.

Apply channel curves

The curve is applied to that layer's negative (the inverted channel), as in the handout's Photoshop step. Drag a point to reshape it, click to add one, double-click a point to remove it. Horizontal = tone before the curve, vertical = after.

Texture 30

Paper warmth 18

Ink limit (D-max) 88

Print size

Resolution

File format

Colour label (top margin) Registration marks (corners + edge centres)

Load an image to see the output size.

Grayscale image files (PNG, TIFF or JPEG) to print on transparency at 100% / actual size: clear (white) where the print should take full ink, black where it stays paper. Reflects the current saturation, curve and per-layer sliders; not clamped by D-max.