Re: cyanotype - ferrocyanide / ferricyanide

You need the ferricyanide. Exposure to light reduces it to
ferrocyanide. When you start with the ferrocyanide no reduction can
take place.

(NL)terminology:

Potassium Ferricyanide = Kaliumhexacyanoferraat(III) or (old name)
Rood bloedloogzout.

Potassium Ferrocyanide = Kaliumhexacyanoferraat(II) or Geel Bloedloogzout.

kees

>Dear list,
>Just a dummy:
>looking for potassium ferricyanide in Europe I found a supplier for
>pot. ferrOcyanide. I have no chemical background, but in the info I
>found on both I think I cannot use the ferrocyanide for cyanotype.
>True??
>thanks in advance,
>Henk
>--
>
>--------------------------------------
>H e n k T h i j s - P h o t o g r a p h y
>photography http://home.hetnet.nl/~ghmthijs
>member of F68 http://www.f68.nl
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Received on Thu Jul 15 04:23:51 2004