The carbon print is a pigment process: a gelatin loaded with carbon pigment is sensitized, exposed under a negative, then developed in warm water. Where light struck, the gelatin hardens and holds the pigment; elsewhere it dissolves. The result is the deepest and most permanent black in all of photography — a print that does not fade. Its weak point lies in what sensitizes the gelatin: dichromate, a carcinogen.
From Poitevin to Fresson: the most durable process
The principle was set by Alphonse Poitevin in 1855; Joseph Swan perfected it in 1864 with transfer. In the 1860s–70s, Adolphe Braun industrialized it — up to 1,500 carbon prints a day — to reproduce masterpieces with unrivalled permanence. And the Fresson family still carries on a direct variant today, the "satin carbon", in its studio — living proof that the process never stopped being desirable.
Braun's carbon (c. 1865, dichromate) and today's Vision Picturale carbon: the same pigment-based, permanent black, without the CMR salt.
The masters of carbon
Carbon is the process of permanence: inventors, industrialists and studios have followed one another without a break. All are in the Maison Picturale library.
From the inventor to the still-living studio — each name links to their prints.
The truth: the sensitizing dichromate
The carbon pigment itself is perfectly inert — one of the most stable there is. The problem is the potassium bichromate (dichromate) that makes the gelatin light-sensitive: the hexavalent chromium it contains is a proven carcinogen and mutagen (CMR), toxic by inhalation. That, and only that, is what must be replaced.
Vision Picturale carbon: archival black, without dichromate
Vision Picturale carbon keeps everything: the pigment, the gelatin , the water development, and above all that deep black that lasts centuries. Only the sensitizing changes: the VP formulation is without bichromate. Consult each product's safety information and the relevant safety data sheet (SDS) when available before use.
Museum black, without bichromate
Carbon printing in a VP formulation without bichromate. Consult each product's safety information and the relevant SDS when available before use.
- Pigment
- Carbon — deep archival black
- Gelatin
- gélatine
- Formulation
- VP — bichromate-free
- Safety
- Read product instructions and SDS
The matter, in pictures
Vision Picturale carbon in a few prints and pigment-black details.
FAQ
Is carbon really the most permanent print?
Yes: the image is made of carbon pigment, chemically inert, in gelatin. With no silver or dye to degrade, a well-washed carbon print lasts centuries.
Does VP carbon give the same black as classic carbon?
Yes: same pigment, same gelatin, same development. The VP formulation without bichromate replaces historical bichromate; consult the product safety information and the relevant SDS when available before use.
How does it relate to the Fresson process?
Fresson is a direct variant of carbon, carried on in a studio. Vision Picturale carbon belongs to the same pigment family in a bichromate-free formulation to be used according to the product-specific safety instructions.
For the full panorama of alternative processes, see our guide to alternative processes or the glossary.
Tristan Sidem & Raphaël Lebas de Lacour — Vision Picturale
