Minimum hole sizes

I have a design that has 80 holes with a diameter of 0.5mm at a thickness of 1mm. It is almost impossible to print these as open holes, in the end after curing they will (almost) all be closed,

What is the best resin for use with small holes like this? So far my best results are with Clear at 0.025mm but this still gives me a 75% failure.

Any suggestions?

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