May it is the high amount of ionizing radiation that is causing it to go
yellow.  He might try putting it into a lighttight  lead box for
storage.

Marshall

Paul Holloway wrote:

> Hello List, I have a friend who lives at 8000 feet altitude.He is
> having problems making CS that doesn't go yellow.His water quality is
> good, as is his technique, from what he describes (cold DW 30v limited
> to <1mA with stirrer or bubbler).He has concluded that the high
> altitude is the problem.I can't see how that would stop him from
> making good quality CS.Any ideas? Paul H