Hi everyone, 

Hi, 

I think f1rob pretty much means the same, maybe this:

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2 U things glued together and then laminated on the outside and compressed with some plates.

> About the DIY oven, I'll start investigate but if you have any pictures, links or tips...

Thanks for reminding me, I have an oven project going on right now, might post a description as soon as it is presentable.
It involves an Arduino and a Raspberry Pi which logs temperature data, acts as a web server and displays temperature curves and controls the whole oven (PID, temperature ramp up and down) over the internet or your local network/WLAN with your smartphone, tablet computer, TV set, labtop etc. Cost for the whole controller will be around 100-150€, plus whatever oven is being used (*cough* ... old broken fridge or freezer *cough*), accuracy hopefully 1°C or better.
Ultimately I want to control an autoclave with it, but that's yet another project.

A real oven isn't necessary, you can improvise this. As I said, cardboard box and hairdryer will work, or a styrofoam box and a few lightbulbs, part wrapped in dark plastic and left in the sun, car parked in the sun in summer... be creative.

> i may be able to ask in the kitchen of my work. Do you know if there is any danger of curing carbon in a protection
> bag and cooking a dish afterwards ?

I wouldn't do it. Not only because of the resin vapours (which might be not that dangerous depending on what resin is used, others might disagree), but since you are using somebody else's oven and other people eating food prepared in it... better not.
Another reason is temperature accuracy. Kitchen ovens tend to be rather inaccurate and the temperature oscillates wildly, like +/-10°C. If you want to tighten them up you need to modify them.