LT, I was not implying anything about adding impurities or the truthfulness of any statements in a news release. I believe that all statements in a news release are generally true.

As I wrote, from my perspective, it appeared that some posters were considering impurities in the final product and others were looking at impurities in the ore (apples and oranges).

The saying "comparing apples to oranges" refers to a comparison of things that are not the same; thus a sort of meaningless comparison.

In this case, everyone could be correct - there were impurities in the graphite ore and those impurities were removed through processing.

As for what SN is saying, I suggest you ask him.