http://armchairgm.wikia.com/Pure_point_rating
Take a look!
Television rating point...
About as pure as you can get.
Pure
MS stands for mint state, and the rating of 60 is on a 70 point scale.
AO rating mean Adults Only
pure pure
There are a huge number of alcohols - each with its own boiling point when pure. There is, therefore, no simple answer.
The melting point would also be 21 degrees because the freezing point and melting point of a pure substance is exactly the same.
melting point
It means the coin is nearly perfect condition. The rating of MS69 is on a 70 point scale.
At Boiling Point all the material evaporates leaving no residue which means it is pure. But if it leaves some residue after evaporating at boiling point then it is not pure. For example : If you take an example of pure water & Saline Water then pure water will evaporate at its boiling point leaving nothing after it. But Saline water evaporates leaves salt behind it.
yea