Ewesly / Holographic Formulae / Nick's No. 6

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Nick's Number 6

Stock Solutions

10 g  Pyrogallol
10 g  Potassium Bromide
One litre water

20 g  Sodium Metaborate
120 g  Sodium Carbonate
One liter water

Development time

Five minutes

Temperature:  23C +- 1C                        Agitation:  Constant

Shelf life

Part A probably a few days to a week, Part B indefinitely.

Primary recommendation for Ilford green-sensitive materials for same wavelength replay in the reflection mode when followed by a rehalogenating bleach.  SP737T will work in this brew but at a stop loss in speed.  A properly exposed plate will sit in this brew for a half a minute before any darkening appears.

Tray life of the combined solutions is about 15 minutes, Part A will last two or three days in a full stoppered bottle, but Part B will last indefinitely.


Nicholas J. Phillips, "The Silver Halides - the Workhorse of the Holography Business", Proceedings of the International Symposium on Display Holography, Volume III, 1988, p.35.