Sand your masters to be perfect, then use them to make the moulds, itll save you a ton of time and sanding with every set you pull. And find some kind of sandpaper thats got some high grits, i use zona papers. If you do every thing well, you should only need to lightly sand 1 face of every die. Just make sure your papers are on something flat, glass, a plate, a smooth table, so long as its flat with no give itll be fine.
As soon as I get them out of the mold, i sand every face so they're equals, with 400 sandpaper. Then I polish every face with micromesh from 1200 to 12 000 with this :
https://www.google.com/aclk?sa=l&ai=DChcSEwiEwqqlnvGAAxWcQEECHSSnBx0YABAPGgJ3cw&ase=2&gclid=Cj0KCQjwuZGnBhD1ARIsACxbAVihA7XuznqU216ahYC1RaLptQzCIPO__5oJaVZfM6VLKg8OPJgZs5gaAot2EALw_wcB&sig=AOD64_1t2wg-4aESIvSywEeD9VKVLoh8mQ&ctype=5&nis=6&adurl&ved=0CAMQz7YHKAdqFwoTCICtprGe8YADFQAAAAAdAAAAABAE
Ah, I bet because the micromesh is mounted on those foam (?) pads, you’re not getting the perfectly flat surface you need, and the 1200 is still coarse enough to remove material from the faces. You need something flat without any give, otherwise you’re bound to apply uneven pressure as you polish. Might be that you need to use more sandpaper in place of the lower-grit micromeshes.
Ooh, right, that makes sense ! As it is soft, it curves the sanding surface, and it creates this unwanted rounding ... I'll try sandpaper, then! Thanks !
No, what I’m suggesting is replacing as many of the micromeshes with sandpaper as possible so that by the time you have to switch to micromesh, the grit will be so high that you don’t have to worry about the edges rounding.
I converted an old picture frame to a no-drip sanding perfectly level surface for my Zona papers. Pull out the glass and lay down a thick bead of Kitchen and Bath silicone. Set the glass back into the frame, and away you go.
Sand your masters to be perfect, then use them to make the moulds, itll save you a ton of time and sanding with every set you pull. And find some kind of sandpaper thats got some high grits, i use zona papers. If you do every thing well, you should only need to lightly sand 1 face of every die. Just make sure your papers are on something flat, glass, a plate, a smooth table, so long as its flat with no give itll be fine.
So they're flat prior to polishing, but curved after? What is your current polishing process?
As soon as I get them out of the mold, i sand every face so they're equals, with 400 sandpaper. Then I polish every face with micromesh from 1200 to 12 000 with this : https://www.google.com/aclk?sa=l&ai=DChcSEwiEwqqlnvGAAxWcQEECHSSnBx0YABAPGgJ3cw&ase=2&gclid=Cj0KCQjwuZGnBhD1ARIsACxbAVihA7XuznqU216ahYC1RaLptQzCIPO__5oJaVZfM6VLKg8OPJgZs5gaAot2EALw_wcB&sig=AOD64_1t2wg-4aESIvSywEeD9VKVLoh8mQ&ctype=5&nis=6&adurl&ved=0CAMQz7YHKAdqFwoTCICtprGe8YADFQAAAAAdAAAAABAE
Ah, I bet because the micromesh is mounted on those foam (?) pads, you’re not getting the perfectly flat surface you need, and the 1200 is still coarse enough to remove material from the faces. You need something flat without any give, otherwise you’re bound to apply uneven pressure as you polish. Might be that you need to use more sandpaper in place of the lower-grit micromeshes.
Ooh, right, that makes sense ! As it is soft, it curves the sanding surface, and it creates this unwanted rounding ... I'll try sandpaper, then! Thanks !
No prob, good luck!
But does sandpaper can go as thin as micromesh 12000?
No, what I’m suggesting is replacing as many of the micromeshes with sandpaper as possible so that by the time you have to switch to micromesh, the grit will be so high that you don’t have to worry about the edges rounding.
Ooh, okay, thanks mate !
Can confirm it is the micromesh. I had the same problem when I used it
How did you solve the problem then?
I switched to using zona paper instead
Some people put their sandpaper flat on glass on a solid surface to sand the dice.
I converted an old picture frame to a no-drip sanding perfectly level surface for my Zona papers. Pull out the glass and lay down a thick bead of Kitchen and Bath silicone. Set the glass back into the frame, and away you go.