Monochrome Definition (S.P.F.)

The official requirement for a monochrome entry to any club competition or SPF competition is as follows:  

“A monochrome work fitting from a very dark grey (black) to the very clear grey (white) is a monochrome work with the various shades of grey.  A monochrome work toned entirely in a single colour will remain a monochrome work able to stand in the monochrome category.  A monochrome image modified by a partial toning or by the addition of one colour becomes a colour work (polychrome) to stand in the colour category.”

In other words, all shades of grey from pure white to pure black with no colour content - ie a photograph in monochrome cannot include a coloured object.   However a toned photograph in sepia is acceptable, again provided it does not contain a coloured object. (SPF ruling 2003)