fibre glass, whats the difference in these two types?
thanks
gareth
they are different topics.
woven roving is large tows that are woven (see my past post “Ah, Toys!” in “Showcase”…that is woven roving in a plain weave.)
Normal fabrics are fine weave, or just simply called fabric. I think anything above 24oz/yd2 is considered roving.
Plain weave is “over one, under one” in both warp and weft directions (0 and 90 deg)
Another popular one is Twill. (either 2x2 or 4x4), where each direction(0 deg) tow, is weaved over 2 and under 2, of the opposite direction(90deg). obviously 4x4 twill is over and under 4 tows each.
o rite thanks, i see that, so woven roving isnt required much for tool making etc. what would you use such roving for?
It is used to build up very strong layers. obviously, if you can build up 24oz layers verus many 5oz layers, things go quicker. I’m sure there are other reasons, I just don’t know them 
lol many thanks riff. i see its used for mould production to strengthen the mould.
il be ordering a very large batch of this stuff and want to cut out the middle man to save some money, does anyone know who makes the plain fabric and csm in the uk?
Thanks
Gareth
Dunno about the UK, but my answer with many things is: Check out Composite World Sourcebook.
http://compositesworld.com/sb
Look on the right hand bar. I would start with Materials.
http://www.glasplies.co.uk/glas/gpshop.htm
These guys are very helpful, speak to Shirley. I have dealt with her and had great customer service,very willing to help. If she didnt know the answer she would find out there and then and let me know!
Thanks John