I am not into NCLT proof Australian silver, but
I have seen the occasional milk spot on them.
I think the R.A.M. (and perhaps the Perth Mint as well), may have addressed this issue in more recent packaging.
Hard acryllic, fully sealed individual capsules for proof coins offer the best protection.
Openable screw capsules are not as quite secure (as per Royal Mint) offer a loewr standard, simply because the capsules ARE openable.
I have seen the occasional milk spot on them.
I think the R.A.M. (and perhaps the Perth Mint as well), may have addressed this issue in more recent packaging.
Hard acryllic, fully sealed individual capsules for proof coins offer the best protection.
Openable screw capsules are not as quite secure (as per Royal Mint) offer a loewr standard, simply because the capsules ARE openable.



















