1. AN FRP QUESTION FROM SUBSCRIBERS.

Subscriber’s question by Joshua Brown:
-“I’m trying to make some carbon fibre parts but every time the part has cured in the mold, I demold it and always find air bubbles and spots where the carbon has slightly lifted around the edges etc, any way to prevent this”

Composite 101, 202 and Advance answer:
For the air bubbles, it depends how to part are produce, by vacuum bagging or by hand layup if it’s by the later it may be caused because you didn’t or miss some spot with the bubble roller. But if you are sure you got rid of all the air bubbles then it’s maybe caused of the same reason why the part is deformed and slightly lift.
The lifting maybe cause by shrinkage of the resin has explained in Composite 101, 202 and Advance or a poor quality resin. Some resin have a higher shrinkage factor than higher quality resin, when used on a well waxed mold, when curing, the part shrink a bit on itself and may cause lifting on the perimeter also known as prerelease.
A simple test to make to see if your resin has a lot of shrinkage is; take a piece of plastic film preferably a vacuum bag 16”x16”. On it, laminate a square of two mat 1.5oz thick of 10”X10” use your resin, let cure and you’ll see if the resin shrink, the square will warp or become like a dinner plate. If it does badly, this means that your resin has a lot of shrinkage and could lead to deformation problem. I say badly because all resin shrink at some degree.

2. WORKSHOP.

We are currently setting new dates for workshops. If you would like to attend one, please let us know your location on the web site form on this page:

workshop.fiberglasstechnique.com

You’ll also find details about those workshops.
We invite you to come visit our website and take a look at the table of content
of our composite visual guide. The guide is currently at a special price.

Guide.Fiberglasstechnique.com

3. COMPOSITE 101, 202 AND ADVANCE VISUAL GUIDE.

Did you know fiberglass doesn’t have to be messy and hard to work with? Get the Composite 101, 202 and Advance visual guide to learn how, find the right way to use it!
You will also learn how to use and create parts & mold along with different molding techniques. This, easy to follow, PDF guide is ready to download is offered with a money-back satisfaction warrantee.