Best temperature to store Ziatype chemicals

Hello everybody

could anybody tell me which of the following chemicals
for Ziatype should be stored at room temperature and
which one should better be cooled dowm for storage and
at what temperature to avoid precipitation?

- Lithium Chloropalladite (solution)
- Feric Ammonium Oxalate 40% solution
- Ammonium Dichromate 5% solution
- Sodium Tungstate 40% Solution
- Tween 20 solution

Many thanks in advance & best regards
Steve
Received on Tue Feb 14 06:00:08 2006