Hi friends,

Please can someone advise me -

I have been making small carbon fibre boomerangs for a few years - quite successfully - using a mould which I wet lay into, and then clamp the two halves together. 3 days later, after curing at room temp, the part is released. All OK. My mould material is Poracast, which is great.

So, I have just made a curing box - a simple themoboard design which is heated internally by using a 40W light bulb. The box maintains a steady 50 degrees celcius. In here I intend to place my clamped mould.

My first question is - what is the recommended temperature for my curing box - a 100W bulb for example will take the box up to 85 degrees. A 60W bulb at 65 degrees. A 14W bulb to 30 degrees. Is 30 degrees best or 60 or what? How long should I keep my mould in here for...?

The reason I made the box was because I read that using heat to cure the part results in a stiffer part - which is very important for this type of boomerang - so the second question is - is this correct? Does it make the cured part stiffer than one set at room temperature?

Any advice here would be much appreciated, as I am a bit unsure (as you can probably tell!)

Thanks,

Adam