Molding and Casting

This week's assignment is about modling and casting materials.

To create the silicone molds and casts, we used Siliconen gietrubber 1:1 shore 15 from RESION, here are some information about it:

Specific gravity: 1.02 kg/dm3
incl. hardener: Yes, you always receive the A component and the B component
Color: Component A Blue, Component B White
Food safe: Yes
Temperature resistance: 200℃ long-term, 300℃ short-term
Processing time: 10 minutes
Curing time (tack-free): 8 hours
Hardness: Shore 15 (flexible)
Shelf life: 2 years (with closed packaging)
Food safe: Yes
You can find the data sheets here for Component A and here for Component B.

Next is the Epoxy. We use UV Epoxy resin, also from RESION, here are some information about it:

Mixing ratio: 100:60 (100 grams resin, 60 grams hardener)
Viscosity: Low (approx. 700 mPa)
Processing time: 30-60 minutes at 20°C
Minimum Processing Temperature: 12°C
Dust dry: after 6-12 hours (20°C)
Handling: after 12-18 hours (20°C)
Full curing: 3-5 days
Heat resistance: 40 - 45 °C
Shelf life: 1 year (at 15-20°C and stored in the dark)

Safety Measurements:

The ata sheet of the hardener and the sheet for the base.

Also, we used another epoxy, which is Polyester lamineerhars, but this was much harder to use. It took longer to harden. Here are some information about it:

Packing: 0.25kg, 1kg, 5kg, 20kg, 230kg
Hardener: 1.5% - 2.5% MEKP hardener
Processing time: approx. 30 minutes (at 20°C)
Curing: approx. 4 - 6 hours (at 20°C)
Processing material: fleece roller or disposable brush
Suitable for: Fiberglass
Shelf life: 1 year (stored in an unopened container in a dark cool place)