The phrase "purest kind" means the most genuine or untainted version or form of something.
Sentences with «purest kind»
These pieces are especially beautiful in a simple pure kind of way. (theinspiredroom.net)
To make these products, antimony must be converted into antimony trioxide, and this bacterium is capable of producing two very pure kinds of crystalline antimony trioxide perfectly suited for industry. (sciencedaily.com)
Tetrists often think of themselves as the most pure kind of game maker. (whatgamesare.com)