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Remember when we had to hand-scrape every part for flatness?
Had a big aluminum plate job, needed to be flat within 0.001. Old guy in the shop said to try a trick from the manual mill days. I put a thin film of layout dye on the surface plate, then gently rubbed the part on it. The high spots showed up bright blue. Took a stone and just kissed those spots, checked again. Did that three times and it was dead flat. Anyone still use that old spotting method for tricky finishes?
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luna55016d ago
Is that really necessary for just one plate?
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the_drew15d ago
Honestly, what else would you do with it?
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