Impurities may cause the threshold to appear lower than they would be in pure materials.

Which means Catalona is the first to deal with pure raw materials and the question of who owns them.

In his view this experience could only be paid for in the purest material: gold.

There have been reports of detonation of the pure material.

Even the buildings are created only with the purest materials derived from the highest qualities of mind.

Very pure material has to be used so it does not leave any residue.

The pure powdered material is pyrophoric, but not its large crystals.

These points are defined by the state changes of nearly pure materials, generally as they move from liquid to solid.

This text is both a valuable historical document and pure tabloid material.

If you knew that, you could figure out how to make it out of less pure materials.