May I know what kind of resin is suitable for making carbon fiber prepreg. i want to make  prepreg by myself, i but not sure what resin can be use and the ratio too.

many thanks,

Liu

Prepreg resin systems can be purchased from prepreg manufacturers like PRF composites or amber composites.
They are formulated specially to go off at room temperature anywhere between 1-30 days.
You could of course, just use infusing resin if you're gonna use it straight away.

As for ratios, you should be looking at under 50%, so you need to weigh the carbon. If its a small bit, you might need a jewlers scale.