Joly

Additive 3 color: Line screen process, still photography
“In 1894 Professor John Joly of Dublin patented a process for producing a screen of red, green and blue-violet lines by ruling them on a gelatin-coated glass plate. Joly used ruling machines of great accuracy, with drawing pens trailed across ...
  • Photomicrograph

7 Images

Krayn

Additive 3 color: Line screen and mosaic, still photography
“Another method of producing a line screen was patented in 1904 by the German Robert Krayn, and was demonstrated by him in November 1907. Krayn stained very thin celluloid sheets red, green and blue, and cemented them interleaved to form a thick ...
  • Coe_CP_Krayn.jpg

7 Images

Dufay / Dioptichrome Plate (sometimes incorrectly referenced as Dioptochrome)

Additive 2-4 color: Line screen plate (réseau), still photography and early experiments with film
(see detail page on Dufaycolor)
  • CooteCP_Dioptichrome

10 Images

Versicolor-Dufay

Additive 3 color: Line screen plate, still photography
“The most successful of all the screen processes was the one initiated by Louis Dufay. Today the product is known as Dufaycolor, but it was first introduced about 1910 as the Dioptichrome plate. The first Dufay patents were assigned to an ...

Kesdacolor

Subtractive 2 color: Line screen filter, duplitized film stock
”The process as illustrated in USP 1431309 was a two-color additive process, but it is stated that it could be a three- or four-color process. For the original photography, the negative was exposed through a line screen composed of alternate bands ...
  • Ryan_Kesdacolor_fig11

1 Image

Warner-Powrie

Additive 3 color: Line screen
“The Warner-Powrie process patented in 1905 was the earliest commercial process using a screen made with bichromated colloid. A glass plate was thinly coated with bichromated gelatin or fish glue and exposed to light through a screen having ...

Spicer-Dufay

Additive 3 color: Line screen (réseau), 35 mm reversal
For a description of Spicer-Dufay see detail page on Dufaycolor)
  • Eggert (1932)

7 Images

Dufaycolor

Additive 3 color: Line screen (réseau), 35 mm and 16 mm, reversal and negative-positive stock
Dufaycolor was a regular mosaic screen process whereby the incident light was filtered through a pattern of tiny color patches in red, green and blue, the so called réseau. When viewed from an appropriate distance, the pattern fused in the eye of ...
  • A Colour Box (1935)

102 Images in 5 Galleries

Dufaycolor reversal

Additive 3 color: Line screen (réseau), 16 mm, reversal
(see detail page on Dufaycolor)

Polavision

Diffusion: Line screen, super-8 mm