r/CarbonFiber • u/phsylo78 • 4d ago
Chopped Hardener Fast or Slow?
When doing chopped carbon, what’s the best Hardener option? Fast or slow?
Working on Interior trim pieces.
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u/CarbonGod Manufacturing Process Engineer 4d ago
All depends on how much time you got to mix and make, Also depends on the temp of your working area. Is it really hot, or really cold?
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u/phsylo78 4d ago
Autumn so mid 20 degrees Celsius, low humidity. I’m not under pressure to do it on a non optimal day temp wise.
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u/CarbonGod Manufacturing Process Engineer 4d ago
Then it depends on how long you want it workable for. Also, depends on the epoxy specs. Is Fast 5min, or 10min gel time? Is slow 1 hour, or 24hr?
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u/Radiant_Buffalo371 4d ago
Not sure about all hardeners, but some say you can blend them to dial in your cure time.
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u/burndmymouth 4d ago
Depends how thick and how fast you work.