Hi,
I am making flat carbon sheets using EL2 resin with fast hardener and vacuum bagging on a glass mould but I am having a problem with a residue left behind when I release the cured sheet.
I weighed the resin and hardener with digital scales and mixed for at least 1.5 minutes.
room temp was about 17 - 18 deg
mould is waxed with mirror glaze
the residue will wash off with soapy water but I'm sure that this is not normal.
this is my  first time using epoxy and carbon  in a mould but I have a background with GRP and have never had this before.
any advice would be appreciated.
Best Regards,
Drew