> "Lighter" weight (not color) components evaporate. The smell of
> epoxy is caused by components evaporating. I had a quart of hardner that
> was reduced to a pint over the summer by evaporation. It was not a major
> brand.

George,

I was specifically answering Steve's question about discoloration of the old hardner he had. I'm not saying that if there was evaporation, it wouldn't affect the product no matter what brand it was.

Alan