The goal this week was to create a solid to negative to solid mold.
It was a bit tricky to wrap my head around the solid to negative to solid workflow, and I began with a more complex figurine but ultimately switched to this petri dish interpretation as it is more in line with my final project goals.
Figure 1. Model Workflow
I ultimately modelled out my solid and boolean differenced it (flipping the model so the solid part is on top) from the wax block.
I must have been one of the last ones to pour my mold as there was hardly any OOMOO left, specifically the PART B. I had to scrape out a few remains from three separate containers and I must admit this led to a very bubbly formula. In the demo the Reynolds expert mixed everything using a transfer between two cups, but upon trying this with the OOMOO I think this should be specifically left to resins or epoxies. As I think with the OOMOO it simply added more bubbles. I was able to - quite aggressively - throw the mold against the concrete ground to remove most bubbles.
Figure 9. Slamming model against ground to remove bubbles
I completely forgot to add a sprue into my design, so in the last minute I carved out this "drain pipe" using an X-acto knife. I should have made two, but was in a rush as I had already mixed the Hydro-stone plaster.