Ferroblend [cupro-cyanotype]
Jeff Wiedner Jeff Wiedner

Ferroblend [cupro-cyanotype]

FerroBlend is a duo-tone contact printing process that combines cyanotype and cuprotype chemistry to produce split-tone prints with blue shadows and warm brown highlights. Learn how it works and see it in my photographic practice.

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What is kallitype?
Jeff Wiedner Jeff Wiedner

What is kallitype?

Kallitype is a contact printing process using iron and silver salts to produce prints with deep tonal range. Learn how the chemistry, toning, and development work, and see how I use it in my photographic practice.

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Cyanotype Process: How It Works
Jeff Wiedner Jeff Wiedner

Cyanotype Process: How It Works

Cyanotype is a contact printing process that produces images in Prussian blue. Learn how the chemistry works, from coating to exposure to wash, and see how I use it in my own photographic practice.

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