Cor Breukel (cor@ruly46.medfac.leidenuniv.nl)
Thu, 22 Jul 1999 13:36:27 +0200 (MET DST)
Judy wrote
> 3. That's because the one time our prints were too light turned out to be
> from contaminated or "off" k ferricyanide.
..I am surprised about that, I thought that the keeping properties of
PotassiumFerriCyanide was excellent, at least it's on our shelfs, got two
realy ancient jars (at least 50 years old I guess) which are still in
perfect shape (the bottles themseld have become a colectors item..;-)..)
Filled with ruby red crystals and indeed some orange dust/small flints
which do not harm at all, as Judy already mentioned
Cor
This archive was generated by hypermail 2.0b3 on Thu Oct 28 1999 - 21:40:37