Designed for producing neutral to cold-tone imagery, this 1L bottle of SE6 Blue Paper Developer from Moersch is a black & white paper developer optimized to create blue-black-colored prints. The final tone of the imagery varies depending on the paper type and if an additional blue additive being used, with the coolest options coming from a combination of a warmtone printing paper and a blue finisher being used during processing. Besides the cool coloring, this developer is also characterized by a long tonal scale, good shadow tone separation, and the ability to vary dilution between 1:10 and 1:15 while still achieving the same Dmax.