Vacuum guides craft (Vacuum Infusion Process of English full name, abbreviation VIP) , material increases in mould surface upper berth, spread next put auxiliary stuff, take out the air in the system, a negative pressure is formed between vacuum bag and mould antrum, the pressure that uses vacuumize process generation presses colophony into enhancing material through the pipeline that extends beforehand, whole pattern is full of after letting colophony soak enhance material, after waiting for goods solidify, uncover auxiliary data, get wants product from the mould.
