: I have started doing home experiments with vacuum bagging of epoxy/fiber.

: I did two identical 6 inch squared pieces with plywood and foam core, one was
: done by hand only and the other vacuum bagged, see pic.
: The fiber/epoxy ratio of the standard piece was 25% (including one fill coat)
: The fiber/epoxy ratio of the vacuum piece was 47%

: My kayak (S&G hybrid) will have foam cored hull (Divinycell H160 5mm), and
: strip deck, hopefully the weight of the hull will be approximately half of
: the weight of a 4mm Lauan 163g glass inside/outside hull.

: I use a Mityvac vacuum pump, used for brakes or whatever in cars and the same
: bag peel-ply and breather fabric as the professionals. Good, and plenty
: of, sealant tape is absolutely necessary if you dont want to spend 5 hours
: pumping. This time I kept approx 25 inch Hg during during curing which may
: be a bit high (some dry fibers on the surface?)

I applaud your industry and will look forward to more reports (and pictures). I was unable to see the pictures. Will you clarify that the 25% and 47% ratio is cloth to epoxy, or vice versa, and how did you make this determination?