Re: Largest Piece Or Smallest Piece First When Laying Fiberglass Cloth Over a Tapered Edge?

For strength, there needs to be a high ratio of glass to epoxy, thus one
squeegies (sp?) out as much resin as possible. If the selved edge of the
narrow piece creates a step that wasn't sanded down, the wider layer of
glass will bridge the step and the space under the bridge will be filled
with air. That's why the plastic *** overlay is so effective.

Roger
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http://home.insightbb.com/~derbyrm

<jaykchan@xxxxxxxxxxx> wrote in message
news:1152119217.300995.57780@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
cavelamb wrote:
(corrected to bottom posting to preserve teh thread)

If you go from the smallest piece first you have a chance of trapping
concentric rings or squares of bubbles in the laminate. Sam


jaykchan@xxxxxxxxxxx wrote:

> Can you explain a bit more on your observation of this problem? I
> don't quite follow you.
>
> Thanks.
>
> Jay Chan
>

You need to try it to see for yourself.

Bubbles are bad.

The are air spaces inside the laminate.

Not good for dimensional stability - or strength :(

But why putting the smallest piece first will increase the chance of
having air bubbles inside the laminate?

Jay Chan



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