The photo blog

Tutorials, techniques and the history of pinhole photography and cyanotype

Transparency films and tracing paper carrying a negative, laid against the light for cyanotype

Best transparency for cyanotype negatives: film, tracing paper or laser

Inkjet film, tracing paper or laser, thickness, ink density and double transparency. How to choose the support you print your cyanotype negative on, by Éric Marais.

Best transparency for cyanotype negatives: film, tracing paper or laser

Inkjet film, tracing paper or laser, thickness, ink density and double transparency. How to choose the support you print your cyanotype negative on, by Éric Marais.

Cotton, linen and silk samples dyed Prussian blue with cyanotype, compared with synthetics

Best fabric for cyanotype: how to choose for your project

Which fibres take the cyanotype blue and which to avoid, cotton, linen and silk versus synthetics, with fabric weight and preparation, by Éric Marais.

Best fabric for cyanotype: how to choose for your project

Which fibres take the cyanotype blue and which to avoid, cotton, linen and silk versus synthetics, with fabric weight and preparation, by Éric Marais.

Several papers of different weights and surfaces compared for cyanotype

Best paper for cyanotype: weight, fibre and surface to check

Which paper suits cyanotype, what weight, which fibres and what surface. How to coat it, dry it and store it once sensitised, by Éric Marais.

Best paper for cyanotype: weight, fibre and surface to check

Which paper suits cyanotype, what weight, which fibres and what surface. How to coat it, dry it and store it once sensitised, by Éric Marais.

Bottles of the two iron salts and distilled water for preparing cyanotype chemistry

Cyanotype chemicals: which ones you need and how to choose them

The complete list of chemical supplies for getting started in cyanotype: the two iron salts, distilled water, containers and the coating tool, with good places to get them.

Cyanotype chemicals: which ones you need and how to choose them

The complete list of chemical supplies for getting started in cyanotype: the two iron salts, distilled water, containers and the coating tool, with good places to get them.

Hands brushing cyanotype solution onto paper in a dimly lit workshop

How to coat cyanotype paper, step by step

How to coat your paper for cyanotype step by step. Mixing the solutions, applying them with a brush or a glass rod, drying away from light and storing, by Éric...

How to coat cyanotype paper, step by step

How to coat your paper for cyanotype step by step. Mixing the solutions, applying them with a brush or a glass rod, drying away from light and storing, by Éric...

Macro detail of deep Prussian blue forming in the fibres of a cyanotype print

Why is cyanotype blue, and where does the colour come from?

Why is a cyanotype blue and not another colour? The history of Prussian blue, the stable, insoluble pigment that forms in the paper fibres. By Éric Marais.

Why is cyanotype blue, and where does the colour come from?

Why is a cyanotype blue and not another colour? The history of Prussian blue, the stable, insoluble pigment that forms in the paper fibres. By Éric Marais.

Close-up of the texture and cotton fibre of a watercolour paper coated for cyanotype

Cyanotype on cotton paper or cellulose: choosing a watercolour paper

How to read the sizing, the weight, the cotton fibre and the surface of a watercolour paper for cyanotype, and choose the surface to suit a photogram or a negative,...

Cyanotype on cotton paper or cellulose: choosing a watercolour paper

How to read the sizing, the weight, the cotton fibre and the surface of a watercolour paper for cyanotype, and choose the surface to suit a photogram or a negative,...

Complete set of cyanotype supplies laid out flat on a wooden worktop

Cyanotype supplies: the complete list of what you need

The complete list of supplies for making cyanotypes: the two salts, the support, the applicator, the glass plate, the rinsing tray and the UV source, by Éric Marais.

Cyanotype supplies: the complete list of what you need

The complete list of supplies for making cyanotypes: the two salts, the support, the applicator, the glass plate, the rinsing tray and the UV source, by Éric Marais.

Basic UV lamp and UV exposure unit for cyanotype side by side on a workshop bench

Best UV light for cyanotype: basic lamp or UV exposure unit?

Basic UV lamp or UV exposure unit for cyanotype: which equipment to buy according to your budget, the power and the real use you will make of it, by Éric...

Best UV light for cyanotype: basic lamp or UV exposure unit?

Basic UV lamp or UV exposure unit for cyanotype: which equipment to buy according to your budget, the power and the real use you will make of it, by Éric...