thick or thin

I’ve been reading and learning, but I wanted to verify what I read. Let’s say I have a mold like the one in the photo attached. My part will come from the blue colored surface.

I’ve read that you use lighter CF cloth for sharp corners and delicate curves. But in this case, I have a big wide curve with no corners at all. So to save money, would it be best to use one or two layers of heavy cloth rather than 4 or 5 layers of light stuff? Also, what about using 12k instead of 3k? Most of the 3k stuff that is reasonably priced is around 6 oz., and the 12k reasonably prices stuff can be found at 19 oz. I understand what “K” means- thousand strands per bundle, but what I don’t understand is how that effects your part. I assume the lower K stuff is just like the lighter stuff- delicate and highly formable around difficult surfaces, and the 12k is for easy surfaces like my mold.

Is this line of thought correct? Thanks so much!

Assuming that you use infusion to make such part, an heavy fabric is not a problem. Instead, the use of fewer layers keep the risk of bridging to a minimum.
12k fabric is ok, Sometime I use 24k fabric.
The only drawback of using fewer heavier fabrics is the risk of having less chances of spreading the fiber in different directions whenever you need to.

Sorry for my english, but sometimes i could make some mistakes. Any correction is welcomed.

Your English is great. Thank you for the response.

Use whatever your preferred material for cosmetics as the first layer and then add thicker, more structural materials behind that.

Instead of wovens, you could also look into multiaxials, which are cheaper as well, on a per lbs or per kg base. These are made with relatively heavy tow (12K, 24K, or thicker) and are spread during manufacturing.

I will do that. Thank you.