It is all too easy to guess the amount of resin required for a project incorrectly, resulting in either wasting expensive resin or running out of resin during infusion, a quick calculation before you mix the resin can save you time and money. This information relates to a standard resin infusion using flow mesh and no material stacks with cores (such as Soric) these will have different resin usage and this should be accounted for.

With Resin infusion you are normally looking to achieve a 60/40 fibre/resin ratio, this means for every, say, 100grams of cloth you will need 66 grams of resin, all of the reinforcements are listed by weight e.g. carbon fibre 2/2 twill 200gsm, the 200gsm refers to the actual weight of the fabric in grams per square meter, so 1 square meter of this cloth will need 133g of resin to achieve the 60/40 ratio. You also need to account for the amount of resin used by the mesh which is 700grams per square meter of laminate, regardless of thickness. Another 100grams of resin will be required by the feed lines and in the bottom of the feed jug.

Here’s an equation that can be used for this;

Quick reference chart for resin consumption in infusion;