Thanks for another good thread Ken.

I've only dabbled in making Mosaic pins but would love to know more about the casting process also. I had the inevitable problems of air bubbles and keeping the resin contained in liquid form in the tubing. I talked with our local really nice Tap Plastic people and they recommended elevating the temp of the mold and reduce the % of hardener a bit. It helped but they gave no specific values. I also found it effected the parting of pieces in the lathe. Slower speed was a better finish but a freshly sharp tool with about a 10° rake worked best. Don't know much about pen turning but admire the art/craftsmanship of it. Also found some good info on the Pen Turner Org but again no real specifics.

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I personally would love to know more about the mold materials based on the typical MEK hardener and hopefully more details or results from temps and mix strategies. Hopefully some of the wizards on this forum can point us in the right directions.
Thanks! ~PJ