This is a colour process using a regular pattern screen developed by George Sydney Whitfield of Paget. A separate screen is used allowing the negative to be processed in the normal way and for the transparency to be made by contact printing. A different screen, with modified colours, was used for viewing the transparency. The process was introduced in 1913, re-introduced following World War I and discontinued around 1925. From 1925 the old-established firm of C. Baker in Holborn advertised a very similar process. The process had a speed of around 15 Watkins, F24 Wynne.

The method of producing the screen was patented in 1908, other related aspects such as the use of a registration device on the screen and the production of prints were also patented.¹

The colour screen consisted of red, green and blue squares with twice as many blue squares as red or green. J.H. Pledge measured the squares as being, on average, 1/400 inch for the side of the blue square and 1/300 inch for the green and red squares.²

For a short period around 1914 a combined plate version was sold as was a process for producing paper prints.

In use a panchromatic plate is exposed behind the Taking Screen. After development a positive plate is made, by contact printing, which is viewed in register with the Viewing Screen. Special plates were sold by Paget for the negative and positive plates. A light filter was used over the lens when making the original exposure.

The image on the right shows the colour screen, taken with a microscope magnification of 48x.