The photo blog

Tutorials, techniques and the history of pinhole photography and cyanotype

Diagram: citrate paper half covered in the sun, washed with ferricyanide in the shade: only the exposed half turns blue

Potassium ferrocyanide (E536): what it is, how toxic it is and how it differs from ferricyanide

Potassium ferrocyanide, a yellow iron II salt and the additive E536, compared with the red iron III ferricyanide used in cyanotype: formulas, uses (salt, wine), toxicity according to EFSA and...

Potassium ferrocyanide (E536): what it is, how toxic it is and how it differs from ferricyanide

Potassium ferrocyanide, a yellow iron II salt and the additive E536, compared with the red iron III ferricyanide used in cyanotype: formulas, uses (salt, wine), toxicity according to EFSA and...

Gloved hands spreading pink flower juice on watercolour paper with a flat brush; in the background, a photo frame with glass in the sun

Anthotype: making sun prints with the juice of plants

An anthotype is an image made in the sun with the juice of a plant, which fades in light: principle, materials and steps, plants tested by Herschel in 1842, exposure...

Anthotype: making sun prints with the juice of plants

An anthotype is an image made in the sun with the juice of a plant, which fades in light: principle, materials and steps, plants tested by Herschel in 1842, exposure...

Close-up of a lumen print: pale leaf with peach and pink tones on a background shading from light pink to deep purple

Lumen printing: colours from the sun on photo paper, with no developer

Lumen printing colours black and white photo paper in the sun, with no developer: what sets it apart from the developed photogram and from cyanotype, why the silver turns pink,...

Lumen printing: colours from the sun on photo paper, with no developer

Lumen printing colours black and white photo paper in the sun, with no developer: what sets it apart from the developed photogram and from cyanotype, why the silver turns pink,...

Fern under glass and ginkgo leaf placed on the glass in the sun, next to the finished print: white fern, pale blue ginkgo

Double exposure cyanotype: two exposures on one sheet, step by step

Exposing the same cyanotype sheet twice under two images: a simple method to start with (an object added during the exposure) step by step, two variations (a negative then plants,...

Double exposure cyanotype: two exposures on one sheet, step by step

Exposing the same cyanotype sheet twice under two images: a simple method to start with (an object added during the exposure) step by step, two variations (a negative then plants,...

A hand rinses a blue cyanotype under running water, revealing white flowers

Sunprint vs cyanotype, and where Solarfast fits in

Sunprint and sun paper are ready-to-use cyanotype, Solarfast a photoreactive dye. Their chemistry, their colours, their supports, and why it is worth preparing your own cyanotype.

Sunprint vs cyanotype, and where Solarfast fits in

Sunprint and sun paper are ready-to-use cyanotype, Solarfast a photoreactive dye. Their chemistry, their colours, their supports, and why it is worth preparing your own cyanotype.

A child holds a black Sténoflex with an adult's help outdoors; the framing hides their faces.

Pinhole camera for kids: getting children started

Pinhole photography with children from about age 8, always with an adult: seeing the image in a camera obscura, loading, setting up, developing. Who does what, how a session runs...

Pinhole camera for kids: getting children started

Pinhole photography with children from about age 8, always with an adult: seeing the image in a camera obscura, loading, setting up, developing. Who does what, how a session runs...

Blue nitrile gloves, tongs and an empty photo tray next to a closed container on a clean work surface

How to dispose of darkroom chemicals: safety from developer to cyanotype

What to do with used fixer, developer and cyanotype baths: safety habits during the session, the disposal route via a household waste recycling centre, potassium ferricyanide, and the rules with...

How to dispose of darkroom chemicals: safety from developer to cyanotype

What to do with used fixer, developer and cyanotype baths: safety habits during the session, the disposal route via a household waste recycling centre, potassium ferricyanide, and the rules with...

Waterside cityscape photographed with a pinhole camera, with soft outlines and darkened corners

Worldwide Pinhole Photography Day: the date, the rules and how to join in

Worldwide Pinhole Photography Day takes place on the last Sunday of April every year, next on 25 April 2027. Date, rules, preparation, scanning and sending your photo, on your own,...

Worldwide Pinhole Photography Day: the date, the rules and how to join in

Worldwide Pinhole Photography Day takes place on the last Sunday of April every year, next on 25 April 2027. Date, rules, preparation, scanning and sending your photo, on your own,...

Goat's beard leaves and flowers in white on a Prussian blue background, a cyanotype by Anna Atkins

Alternative photographic processes, from the daguerreotype to cyanotype

Historical photographic processes, from Niépce's heliography to platinum: camera or printing process, dates, inventors, look, and the two simple routes to try at home, the pinhole camera and cyanotype.

Alternative photographic processes, from the daguerreotype to cyanotype

Historical photographic processes, from Niépce's heliography to platinum: camera or printing process, dates, inventors, look, and the two simple routes to try at home, the pinhole camera and cyanotype.