Sulphur nonsense? ZEN released a table that showed ash at .1%, iron at 90 ppm and sulphur at 132 ppm. Those three impurities alone bring the graphite's purity down to 99.878. I have no idea why they released that chart, when they'd avoided the numbers previously, and I've seen no mention of it since. But sulphur is there in more than just measurable amounts, and it helps bring the purity down below 3 nines. Your saying the presence of sulphur is nonsense is truly the nonsensical statement. Those were numbers ZEN released themselves.