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 sheet overlay is so effective.

Roger
derbyrm@xxxxxxxxxxxxxxxxxxxxxxxxx
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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