How much resin do I need for 100g of carbon fibre?

Resin Calculations for Carbon Fibre Lamination

The recommended guideline is to use approximately 70–110g of mixed epoxy resin for every 100g of carbon fibre. The precise amount depends on the density and weave of your fabric and how the resin is applied. Lighter weaves tend to soak up less, while heavier or more open weaves may require more resin for complete saturation.

• Start with a test patch if unsure about your fabric’s absorption.
• Aim to use the minimum resin needed to fully wet out the fibres without over-saturating, as excess resin adds weight but not strength.
• Keep resin measurements accurate – many resins, such as the “Carbon Resin” – Epoxy Resin for Carbon Fiber & Fiberglass Coating, require specific mixing ratios by weight.

Choosing and Applying the Right Epoxy Resin

Selecting the right epoxy for carbon fibre projects ensures proper impregnation and finish. “Carbon Resin” is formulated for easy application and is well-suited for both hand laminating and vacuum bagging techniques. Ultra-clear multi-purpose resins such as “Trasparente” Epoxy Resin Kit can also be used effectively, especially when appearance matters. Always mix and measure accurately to ensure a reliable cure and robust structure.

When This Matters

Choosing the correct resin amount matters most for structural, aesthetic, or weight-sensitive projects – for example, model making, automotive parts, or composite tables. Insufficient resin can leave fibres dry and weak, while overuse might result in a brittle, heavy finish.