mixing resin with catslyst powder not consistent

[Pierluigi]

hi there
i had previously confirmed a defined curing cycle of a resin (liquid novolac 40,000cps) mixed with a powder catalyst (organic) at fine particles, at a small scale of 2kg. The curing cycle is in combination with a Part A epoxy.
Now i am scaling up the mix of the novolac+catalyst to 8kg and somehow the final curing cycle (in combination with the epoxy) does not remain the same; with one batch it s slower, with another faster .
the ratio of the novolac to catalyst is obviously kept the same and the mix seems well homogenized.
when i try the curing cycle, i prepare a 100ml cup test in reaction with a part A.
what can actually be happening?
can you share any comment? advice?
many thanks!
Pierluigi

[Katherine Swift]

Hi Pierluigi,

Have you asked the manufacturer for help on this?

[Author]

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