<<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>>
          <<  Lancair Builders' Mail List  >>
          <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>>
>>
With regards to darkening of the hardener over time in the sticky stuff
dispenser, this is sometimes called amide blush and this does happen to the
material in the presence of atmosphere.  The color change is also affected
by a part in the dispenser which tends to turn it darker as well.  Lancair
and the Sticky Stuff folks promise that the discoloration in no way detracts
from the necessary qualities of the cured resin.  Once again, they only
recommend that you don't leave resin in the pump for months on end and then
use it - due to the volatility concerns I mentioned in the last note.

John Barrett