Developer-Bleach Combinations

The following are the comments of Ed Wesly for the two most common developers, CW-C2 and Pyrochrome, when used in combination with the two most common bleaches, the rehalogenating copper sulfate and the solvent pyrochorme.

Developer	Time	Bleach	Result
CW-C2	1 to 4 minutes @ 20°C	Copper Sulfate	Non-shrinking regimen keeps the replay color of reflection holograms exactly the same color as the laser's. Can be used for image-planing, contact copying, or real-time reflection interferometry. For laser transmissions gives excellent brightness and signal-to-noise ratio with replay angle same as the recording reference angle. For white light transmission the bluish scatter may be objectionable for those who seek that perfectly clear window aesthetic.
CW-C2	1 to 4 minutes @ 20°C	Pyrochrome	Yields orange to green reflection holograms depending on developed density—more density gives shorter wavelength replay. Shrinkage can cause change in reference angle for transmission holograms. Plate is totally clear after process.
Pyrochrome		Copper Sulfate	Not recommended.
Pyrochrome	1 to 4 minutes @ 20°C	Pyrochrome	Yields red to green reflection holograms depending on developed density similar to the CW-C2/Pyrochrome combination. some change in reference angle for transmission holograms. Holograms have characteristic tan color, which helps reduce grain noise. Tan color can be removed with S-13 Stain Remover.