Watch the video. In the process of vacuum infusion, the fabric is a complex structure, like your laminate or part. So, for quality parts, you need to choose the right fabrics: the right binder fiber (sizing), the right fabric structure, and, of course, the right vacuum infusion parameters. In this case, you can be sure of the high quality of your part.
Moreover, these parameters affect the fabric permeability coefficient - one of the main parameters of Darcy's law and which affects the infusion time of your part.