Fiber glass cloth has a sizing coating on each strand to help the epoxy resin to bond to the glass. The shelf life for most fiber glass sizing is five years. After that time the wetting out with the resin becomes more difficult and will result in a weaker structure. The older the cloth the worse the situation will be.
Sid Wood Tri-gear KR-2 N6242 Mechanicsville, MD, USA ---------------------------------------------------------------- > I have searched the archives with no luck so I would like to post the > following question to the group. > Is there a way to determine the weight of fiber glass cloth based on the > thickness of the material ? > > I have recently been given some cloth by a former boatbuilder but am > uncertain to the weight (oz../sg.yd.) His widow just wanted it gone so I > was happy to help her in that regard. > > Both compare favorably to the sample picture in the Wicks listing for KR > cloth. in that both batches seem to be BID( woven at right angles). > One has 18 threads per inch and is .008" thick. > The other is 15 threads per inch and is .013" thick. > Can anyone confirm that either is suitable for use on the KR? > Other than cutting out a sq. yd. and weighing it is there a way to > determine what I have ? > I hate to cut it up if I can determine what it is by other means. > > Also, does anyone have an approximate count as to how many yards of cloth > is needed to complete a KR ? > > Thanks, > > -- > Jim L. > e.flyer1"at"cox.net > Virginia Beach VA >
