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Hello everybody, I contact you for a few problems about a carbon kevlar tray I ve made URL=http://imageshack.us/photo/my-images/707/40791410150587709709216.jpg/]  [/URL] My first problem is for me a real nightmare: tiny bubbles:   I eliminated a lot them by using resin infusion (but not all of them) and using bristle roller but to have a perfect finish, I don't see any other way than to varnish (if there is an other possibility please let me know) So I would like to know how to make this perfectly, what products do you use (I didn't see them on your shop) and the application method to have a perfect gloss finish . For my second question, I've done this tray with 2 layers of carbon kevlar and with 2 of red traced carbon ^^ in the middle but it's too flexible specially on the flat part.    I would like to know if it's possible for a next one to make it more stiff by putting a kevlar cross in the middle of the reinforcement layers Throughout the flat part and if it will be (for just one kevlar layer) visible on the exterior of the tray? Or if is it possible to make the tray for stiff by an other way (curing?) cheaper than to put 2 or 3 more carbon reinforcement layers. By advance, thank you for all your answers 
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hi Firstly thank you very much for all your helpful answers !! For the carbon tray, I pulled at full vaccum (-1bar) but unfortunately I had tiny bubbles but only on the edges of the part, I don't know why, I remember the vaccum was total... For the carbon tray, I remember I had bubbles in the infusion mesh next to the vaccum connector when I was obliged to clamp but why ? :-/ But I don't see why you talk about 3 layers of infusion mesh, I putted only 2 layers (the principal and an additional on the end of the infusion next to the pump connector) To be sure I understood, I wait for the resin had totally infused the part, once the resin starts going to the catch pot, I clamp the feeding line, and 30 second after I clamp the vaccum line, isn't it? For repairing this bubbles, I tried a bi composent lacquer but it smoothed itself very bad: I had very little retraction everywhere :-( (if you know a perfect product, it could be different) So, except the lacquer, it rest the varnish or an additionnal layer of resin (glazing), I imagine with infusion resin which is more fluid to fill the bubbles but I suppose it will need sanding just after... so I think I necessarily will need varnish to have a gloss finish (especially for the part which was in contact with the peel ply) Thanks Matt for the 45° possibility to increase the deflection strength but it will be difficult to avoid carbon losses with that way, I thing I gonna use sonic material, but with this material, because the infusion is made my inside, the both side have aspect like peel ply side isn't it? Warren, very nice plate, I had the idea but I didn't dared because I was affraid to detroy it with the knife, it s seem not be a problem for you ^^
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Go see: https://www.easycomposites.co.uk/resin-infusion-starter-kit#video04:45. Step 8. Add an additional 2 EXTRA layers of infusion mesh on top of the original infusion mesh... 11:25. Step 20. Degas for 10 min... 12:50. Step 23. Clamp feed line once resin reaches the catch pot... (let it drip into the cup for 2 or 3 seconds) 13:00. Step 24. Wait 10 seconds and then clamp the vac line... These are the steps that I think will help you a bit more. Take note of the size of the mold/part in the video, I would say about 800mm x 800mm, Matt only "bleeds" the resin for about 10 seconds... I would say your tray was about 550mm x 400mm and if you "bleed" it for 30 seconds it could come out a bit dry. I have also noticed that different weaves/twill/materials/cores/part sizes all have different infusion and bleed times and it can be tricky... Does the top of your tray face the peel ply and infusion mesh?
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