u/Bliker1002

Hi there, my company is making some scientific equipment and we need very fine feature sizes (0.1-0.5mm) on a few small (10-50mm) components. However, we need a decent quantity of them so CNC is pretty impractical cost-wise. I was thinking we can SLA print with a clean-burning resin and vacuum cast the parts, but I’m worried about defects from investment. Does anyone know what the best way to ensure a really smooth interface? Or maybe a recommended brand/type of investment that has really small particle sizes?