Over the weekend I casted some rods of ruby red polyester to make a fountain pen.
It was my first time but think some of you have worked with polyester already.
I casted the polyester in brass tubes with 0.50 mm walls. After hardening for 24 hours the polyester was still not really hard and I dropped them into the kitchen stove for one hour at temperature of 120°C. After cooling I realized, that the polyester has shrinked a little bit an the rods could easily be pushed through the tubes. Then the material was really hard, good to turn and drill but difficult to cut the threads.
And this is what came out
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