On Mar 18, 5:33 pm, Bob Kuykendall wrote:
On Mar 18, 10:24 am, Fred the Red Shirt
wrote:

But some of the descriptions include a 'finished weight' which
is slightly different from the 'other' (nominal?) weight.

...

But seriously, I'm as mystified as you are.

I think Mr MItchel has the answer, finishes are described on these
pages:

http://www.fiberglasssupply.com/Prod...s_fabrics.html

http://www.thayercraft.com/


As regards the weights of fiberglass parts, I've generally had good
luck just doubling the total cloth weight. That's generally what I do
to figure out how much resin to mix - I just take the cloth, weigh it,
and mix that much epoxy. It comes out a bit high for vacuum bagged
parts, and a bit low for soupy tooling layups, but generally puts me
in the ballpark.


Yes, my estimate was about 2.1 times the cloth weight, but that
assumed the fill was level with the weave on both sides. An inside
surface could be left a bit 'waffly;'

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FF