Vacuum bag can be used carbon fiber

For simple pieces of which relatively few copies are needed, (1–2 per day) a vacuum  bag can be used. A fiberglass, carbon fiber or aluminum mold is polished ,basalt fiber and waxed,  and has a release agent applied before the fabric and resin are applied, and the  vacuum is pulled and set aside to allow the piece to cure (harden). There are two  ways to apply the resin to the fabric in a vacuum mold. One is called a wet layup,  where the two-part resin is mixed and applied before being laid in the mold and  placed in the bag.
The other is a resin induction system, where the dry fabric and  mold are placed inside the bag while the vacuum pulls the resin through a small tube  into the bag, then through a tube with holes or something similar to evenly spread  the resin throughout the fabric. Wire loom works perfectly for a tube that requires  holes inside the bag. Both of these methods of applying resin require hand work to  spread the resin evenly for a glossy finish with very small pin-holes. A third method  of constructing composite materials is known as a dry layup.
Here, the carbon fiber  material is already impregnated with resin (prepreg) and is applied to the mold in a  similar fashion to adhesive film. The assembly is then placed in a vacuum to cure.  The dry layup method has the least amount of resin waste and can achieve lighter  constructions than wet layup. Also, because larger amounts of resin are more  difficult to bleed out with wet layup methods, prepreg parts generally have fewer  pinholes. Pinhole elimination with minimal resin amounts generally require the use of  autoclave pressures to purge the residual gases out.