Difference between revisions of "Ewesly / Holographic Formulae / CWC2, JD-2, JD-3"

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=== Development time ===
 
Reflection holograms: One minute for films, two for plates.<br />
 
Reflection holograms: One minute for films, two for plates.<br />
Transmission holograms: Two to four minutes.</p>
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Transmission holograms: Two to four minutes.
 
<p><u>Temperature:</u>&nbsp; 20C&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;<u>&nbsp;Agitation:</u>&nbsp; Constant</p>
 
<p><u>Temperature:</u>&nbsp; 20C&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;<u>&nbsp;Agitation:</u>&nbsp; Constant</p>
  

Revision as of 17:35, 1 January 2014

Developer

PART A
20 g  Catechol
10 g  Ascorbic Acid                       
10 g  Sodium Sulfite           
50 g  Urea
One litre water

PART B
60 g  Sodium Carbonate
One litre water

Mix equal parts together before use.

Development time

Reflection holograms: One minute for films, two for plates.
Transmission holograms: Two to four minutes.

Temperature:  20C            Agitation:  Constant

Primary recommendation

For developing the discontinued Agfa Holotest 8E56HD and 8E75HD films and plates.  Follow with a rehalogenating/diffusing bleach for no emulsion shrinkage, or 'Chrome bleach for change of replay wavelength in the reflection mode.  Works well on Slavich PFG-01 plates and Fuji films.  Also useful for processing Bulgarian Academy of Sciences HP-490 Holographic plates.

Shelf life

Part A can last a month in a tightly stoppered bottle; Part B can last indefinitely.  The combined solutions can last at least a day in a covered tray.

Notes and References

D. J. Cooke and A. A. Ward, "Reflection-Hologram Processing for High Efficiency in Silver-Halide Emulsions," Applied Optics 23, 973 (1984).

Although I wrote this a long time ago, I just recently illustrated it with examples of the test strips. The Agfa 8E75HD plates mentioned are long gone, but the developer is still used, and the descriptions of the process and the methodology of testing are still sound. It's a 14 page PDF, so it will take a while to download, but worth it. Some of the stuff mentioned in the footnotes might pop up on this site in the future.