Definition: Epoxy resin is a two-component thermo-hardening liquid polymer.
Apart from the “technical” definitions, epoxy resin is a liquid product which, if exposed to a minimum temperature of 10-15°C, begins to catalyse and then solidifies.
Here are some “fundamental” points for who approaches this product for the first time.
How do you dose resin?
Since it is a two-component product, the package features 2 containers, one with resin “A” and the other with hardener “B”.
Equip yourself with an electronic scale to weigh the grams and with a container to mix the liquids
Put the amount of A you think you need in the container, trying to get a round number in grams (e.g. 200 gr), this will make it easier to count how much hardener to add.
Each product features on the container of B (or even on both) the usage ratio
Let’s make an example with 100A: 60B. Multiply the grams of A previously weighed (200g) by 60 and then divide by 100, the result will indicate the grams of B to be added.
Practical example (ratio 100: 60)
40 gr [0,08 lb] component A. how much component B should I add?
Solution A 40/100 = 0.40 A 0.40×60 = 24. This means 24 gr [0,05 lb] of B.
This formula can be used for any usage ratio, 100:50, 100:30, etc.
How to prepare the resin?
After having been accurately measured, the resin must be mixed in an irregular way (so, not always in the same direction) for at least 2-3 minutes. This passage is fundamental, since if you mix it only for a few seconds, the resin won’t be well homogeneous at the molecular level, and therefore it will remain soft/opaque in some parts
How much does the resin harden?
Hardness depends on the formulation, the resting time and the catalysis temperature.