Tony Renshaw wrote:
>
> Gidday,
> I would like some advice on "when is the right time to discard hardener that
> appears to have darkened in colour, and gives off quite an odour (mind you,
> it may always give off this smell). My hardener in my resin pump has only
> been transferred from the bottle for about 6 weeks, and I have preheated my
> resin cupboard to between 20-25 Degrees for only the last fortnight for
> layup purposes. I have been told previously to be careful with less than a
> full container due to the container having a large entrapped volume of air
> that can proceed over time in dumping its moisture into the hardener. In an
> attempt to control air circulation within the container I have taped its
> breather hole, and only let it breath when I pump a mix. I do however leave
> the lid off both the resin and hardener whilst I am doing glasswork, however
> the room is well dehumidified. I believe smell can be an indicator of when
> to turf it, but as I always wear a charcoal filtered/particle respirator, I
> dont really know what "normal is". It still seems to work OK, and is only
> about 1 year old, kept in a stable temperature environment. I am about to do
> the tailplane skin layups so I want to solve this dilemna beforehand.
> Any advice will be appreciated. Thanks in advance.Tony,
I had a talk with Ampreg agents here in NZ AKL regarding your worry. They
indicted to me that the discolouring was not a problem. Only when it
starts to crystilize then it can be a problem. Even then by reheating it
and returning it to its previous viscosity it can be still used. However
that may be time to discard. Tony K found the prices here of the Ampreg
products was very competitive!!I have slight discolouring of my first
bottle placed into the pump.
Cheers,
Tim
Timothy. P. Ward
26 Tomes Road
Papanui,
Christchurch 8005
NEW ZEALAND
PH 64033525726
Fax 64033525726
Email: ward.t@xtra.co.nz
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