Found some old bottles of REY Green-flux in a storage room. It
is clear not green. Does the color disappearing from green flux
indicate that it is not usable any longer? Any thoughts from
anyone out there?
The flourescent (sometimes) green dye is just there to make it sexy
for the marketing types. Makes it compete with Batterns, which also
has an otherwise functionless dye. And yes, it fades. Without
affecting the utility of the flux.