Dear all, I need again your precious advices. I started a couple of years ago to make composite laminates by using vacuum infusion with easycomposite equipment and materials. I am satisfied of the laminates that I obtain. However, last week I experienced a new problem. I was degasing the resin+hardener before the infusion (I use the EC20 pump with the big vacuum chamber), the bubbling phase was almost finished, and then, suddenly, the bubbling started again for few seconds. Afterwards, it started again and then stopped after few seconds. This was repeated few times before I stopped the process. It was the first time that this happened. However, I decided to make the infusion with that resin and the results is that I had some voids in the plate that I produced (of course the bag was super OK). Anyone of you can help me regarding this problem? Any Idea?

Pinholes and voids with infusion tend to be related to other issues, rather than degassing. The only time I have ever found degassing to help, is when you have bridging or areas of fine detail that you can't get fibres into (which is essentially still bridging), as these areas are where the air bubbles will accumulate and hold. So if you had those issues and you didn't degas, there's a good chance they will end up either looking cloudy because they have a million tiny bubbles. 

But if you have a really good layup with no bridging anywhere, then the air bubbles and other potential volatiles that are in the resin dont tend to show up as voids or pinholes. On inspection with an electronic microscope you may be able to detect a higher void content in the matrix, but there certainly shouldn't be any visible defects or porosity at all. If its visible, it is likely another problem. If your vacuum is solid, I would be looking at infusion speed (especially if your layup has any areas with staggered thickness), and resin content. Being a tiny bit too lean can have a big effect on surface finish and porosity level, which becomes especially noticeable if you are clear coating. So for cosmetic parts, its a good idea to lean on the slightly resin rich side and leave the resin feed open a touch longer - especially considering the actual weight difference this makes to the part once you have removed the consumables is very negligible.