# Lecture notes local Don't forget to add vents to design for air to escape ![alt text](image.png) make pins when having 2 part mould ![alt text](image-1.png) Credits: Saco ![alt text](image-2.png) ![alt text](image-3.png) Pot life - The amount of time it takes when it's mixed to harden Handling time - After 4 hours it can be moved but not removed Cure time - Time for it to takes to completely harden exothermic reaction can cause plastic cups to smelt when mixing. Do so carefully to not create airbubbles. https://www.smooth-on.com/documents/ ![alt text](image-4.png)