Pictorialism - Techniques

Techniques

Pictorial photographers began by taking an ordinary glass-plate or film negative. Some adjusted the focus of the scene or used a special lens to produce a softer image, but for the most part the printing process controlled the final appearance of the photograph. Pictorialists used a variety of papers and chemical processes to produce particular effects, and some then manipulated the tones and surface of prints with brushes, ink or pigments. The following is a list of the most commonly used pictorial processes. More details about these processes may be found in Crawford (pp 85‒95) and in Daum (pp 332‒334). Unless otherwise noted, the descriptions below are summarized from these two books.

• Bromoil: This is a variant on the oil print process that allows a print to be enlarged. In this process a regular silver gelatin print is made, then bleached in a solution of potassium bichromate. This hardens the surface of the print and allows ink to stick to it. Both the lighter and darker areas of a bromoil print may be manipulated, providing a broader tonal range than an oil print.

• Carbon print: This is an extremely delicate print made by coating tissue paper with potassium bichromate, carbon black or another pigment and gelatin. Carbon prints can provide extraordinary detail and are among the most permanent of all photographic prints. Due to the stability of the paper both before and after processing, carbon printing tissue was one of the earliest commercially-made photographic products.

• Cyanotype: One of the earliest photographic processes, cyanotypes experienced a brief renewal when pictorialists experimented with their deep blue color tones. The color came from coating paper with light-sensitive iron salts.

• Gum bichromate: One of the pictorialists' favorites, these prints were made by applying gum Arabic, potassium bichromate and one or more artist's colored pigments to paper. This sensitized solution slowly hardens where light strikes it, and these areas remain pliable for several hours. The photographer had a great deal of control by varying the mixture of the solution, allowing a shorter or longer exposure and by brushing or rubbing the pigmented areas after exposure.

• Oil print: Made by applying greasy inks to paper coated with a solution of gum bichromate and gelatin. When exposed though a negative, the gum-gelatin hardens where light strikes it while unexposed areas remain soft. Artist's inks are then applied by brush, and the inks adhere only to the hardened areas. Through this process a photographer can manipulate the lighter areas of a gum print while the darker areas remain stable. An oil print cannot be enlarged since it has to be in direct contact with the negative.

• Platinum print: Platinum prints require a two-steps process. First, paper is sensitized with iron salts and exposed in contact with a negative until a faint image is formed. Then the paper is chemically developed in a process that replaces the iron salts with platinum. This produces an image with a very wide range of tones, each intensely realized.