Halo guys,
Im infused my carfront hood using infusion process. all good (less bubles/voids) except this problem. the carbon looks ‘pressed’ after demould. I’m using VINYELSTER resin with 28-30"Hg vacuum pressure. https://mail.google.com/mail/u/0/?shva=1#search/chia/13927c8c7e93bd4f
please post a picture, the link doesn’t work. If you’re saying that the wave looks pressed flat - wider then thats ordinary for infusion and indication of high quality for some people - including me!
The fibers look squished because they are. 
When you compact a woven fabric the fibers get pressed closer together. They also spread out to fill the open areas between the adjacent yarns. This increases the fiber volume fraction (Vf) which can be good thing (less weight for given volume of fiber). The laminate thickness also goes down for a given layup as the compaction increases. This can have a negative effect if some parts of the structure undergo compression forces. Thinner laminates are more prone to buckling than thicker one. In many structural applications, laminates that get highly compacted need more fiber, over a lower compacted counterparts, to resist buckling. The end result is lighter and stronger but requires more material costs (more fiber) and more labor (more layers going into the mold). You cannot get greater performance in composites without more input (material & labor).
I have witnessed controlled tests where highly compacted structures perform worse than lightly compacted structures simply because the laminate wall is thinner. The highly compacted structure were lighter though. Compacting a laminate to a higher degree almost always make the structure weaker (and lighter) for a given layup. Put another way, you can create a part/layup without compaction and have it be structural adequate. You can then create the same part/layup with a higher degree of compaction and have it fail. You can also create the same part, use more fiber in the layup, use a higher degree of compaction, and have the part be lighter and stronger than the non-compacted layup.
Confusing?
To add to this, a 1" laminate that is hand laminated (low Vf, fiber/volume ratio) will be lighter than an infused 1" laminate (high Vf).
the infused laminate holds more fiber and less resin. Fiber is relatively heavy, where resin is relatively light.
I have a set of laminate samples made by Lantor, which show the effect:
1.base laminate is hand laminated 6mm (1/4") glass
2.infused laminate with same amount of fiber is 3mm (1/8")
3.infused laminate with same thickness needed twice the amount of glass, and is some 25% heavier.
4.infused laminate with Lantor Soric in the middle is same thickness, but about same weight as the 3mm laminate.
Can any1 teach me how to post picture/video?
post reply—>Additional Options—>Attach Files—>click “manahe attachements”
I do it by using the “Go Advanced” button (next to “Post Quick Reply” button). Then you can scroll down and use the “Manage Attachments” button.