Hardener
Hardener is added to the resin mix to start the
solidification (or curing) process. The time taken before
the resin sets is controlled by the amount of hardener
and accelerator (cobalt) added. Once the hardener is
added to the resin it must be worked quickly into the
fibreglass as the resin will solidify quickly.
An imported MEKP hardener is used due to its more
reliable properties and hence more reliable resin setting
time.
Cobalt
Cobalt is an 'accelerator' that speeds up the hardening
process when added to the resin. This can be used to
help control the setting time of the resin.
Toner
This only adds colour to the resin. It has no structural
properties. It is used to colour the outer layers of resin,
rather than paint the blades afterwards. This can be
obtained in many different colours. Approx 5 to 10% by
weight is added to the resin mixture until the correct
colour is reached. Adding a greater amount than this
may inhibit the solidification process. Adding toner
makes the lay-up stage easier as you can clearly see
where the resin is, however this makes the foam filling
stage more difficult as the blade is then opaque.
Lowilite
This is a UV stabilizer and must be used on the outer
layers of resin. It helps to prevent material degradation
by sunlight. It is supplied in powder form.
7