Cyanotype - Sun Print Filter

Pick a photo and it becomes a sun print. Deep indigo, vivid blue, and hand-coated mottling — all rendered entirely on your device. No AI, no ads.

Turn photos into sun prints.

Cyanotype recreates the 19th-century sun-printing process entirely on your device. One photo in, one print out.

DARKROOM CONTROLS

• Exposure: how deep the print burns
• Wash: developer-like unevenness
• Grain: paper texture
• Brush edge: the coater's brush marks (re-rollable)
• Paper: natural / white / cotton

PRESETS Classic, Botanical, Blueprint, Sun-faded.

POSTER FINISH Margins, ratios (1:1, 4:5, 3:4, 9:16), rounded corners.

PRIVATE BY DESIGN No AI. No network. Your photos never leave your device.

TONING SET (one-time purchase)

• Removes the small "Cyanotype" seal from your exports
• Five extra inks (Tea Sepia, Verdigris, Pale Indigo, Steel Blue, Wisteria)
• Three extra papers (Washi, Indigo-dyed, Coarse)
• Framing (hairline, double rule, plate mark)
• Saving your own presets
• Title and date inscription, and contact sheets
• 4096px export No subscriptions. A single one-time purchase.

Free version includes every slider, every preset, and 2048px export. Prints exported for free carry a small "Cyanotype" seal in the lower right corner.