Does anyone have a definitive reason why certain bullion gets milk spots or oxidation.. Bullion bourse have this disclaimer and it got me thinking.. Please note 99.99%pure silver coins from the RCM may have milk spots or oxidation due to their purity. We have no control over this. ... If the reason is because it is four nines fine, how come the NZ silver fern bullion dosent suffer from the same fate, also how come other bullion only three nines fine also get milk spots - ie: philharmonics. Id be interested to know 1for1
I think there is somthing left over in the process they use annealing the coins ?, NZ coins are 9999 and South American are 99999 and i don't think they get spotting.
http://www.royalsmithbullion.com/index.php?option=com_content&view=article&id=52&Itemid=56 Some chemical used in cooling to prevent crystallization and thus brittleness, can't remember what it was (will try find it)
i have some ferns with small milk spots on them.. only on the fern side tho.. never on the southern cross side.
Is a big disappointment when your so called gem quality, brilliant uncirculated coins are badly marked with these milky spots. Dealers are not interested nor is the RCM stating you buy these bullion coins by weight only. Pity the description states BUNC. Imagine buying a brand new sports car only to find it covered in bird shit which you cannot remove and the dealer saying never mind the car performs just the same.
I'm surprised anyone buys RCM coins, I got a few Grizzlies last year that were so bad I'll never buy there coins again.
Reckon you were unlucky. I have over 50 each Wolves, Grizzlies and Cougars and no milk spots. When the 2011 Maples were issued I bought a tube of 25 and many were stained but also showed scuffs and some holes as if punched in a machine as they were all in the same place. Sold to me as stunning beautiful coins - they were CRAP . I guess the mint is happy to ship its rejects and some folks are just unlucky in what they receive from dealers that buy the monster box without checking the contents. The usual answer it is a bullion coin. Never had quality problems with American Eagles, Libertads or Philharmonicas - all bullion coins.
weak acids like acetic acid (vinegar), citric, sulphuric and dilute nitric acid will turn a spotless round, milky in seconds.
because humidity, the coin self, bit hot when it came out, after touching with oxygen (fresh air), if dry air, then all fine, but if facing with humid air, then milk spot may comes out. by the way, that's same quality for bullion coins with milk spot or not. because oxidation will make them looks same 10 years later.
Don't know if Drutter is right but here's one of his vids. Someone in the comments recently called Provident metals and was told the milk spots are residue that gets baked in. I heard it's incomplete rinsing of borax solution that's the culprit... http://www.youtube.com/watch?v=-eV49frrQzs
Whatever the technical explanation read "BAKED ON CRAP " and I just took delivery of a tube of new Cougars and 3 had spots and splashes. Not acceptable quality control in this modern age especially when you are expecting a beautiful uncirculated coin as described in the sales literature. No discount for rejects but the RCM is happy to pass on its shit to us stackers. Pity those who buy only a few coins as collectors and get shipped the shity ones with no opportunity to exchange without incurring costs of shipping etc.
A year ago received 2 tubes of grizzlies---37 out of 50 milk spots---got 2 tubes of cougars 2 months ago---all perfect--????---Will never buy RCM bullion again with the exception of the last 3 in the wildlife series. There is no reason freakin Kasakstahn can make milk spot coins free coins and RCM cant!!!
Yes, other than the fact they are ugly, the potential for milk spots (a very % chance i might add) kills any potential gain over spot they may potential have risen. So tell me, has this put you off or are you still game for more given the many various other kinds of investment grade silver? Ill give my feedback with my wallet and Ill give em a miss! 1for1
