I think both produce a very high purity product. A4N has to be...

I think both produce a very high purity product. A4N has to be the gold standard in reporting their production results.

eg. https://alphahpa.com.au/wp-content/uploads/2021/03/ASX-2021-03-02-product-marketing-and-project-update.pdf

I also note 2 of those samples are <15ppm impurities so it's funny how A4N don't claim they've produced 5N HPA. @Tcb007 Thoughts??

Since those results they also came out with the news of producing battery grade HPA particle sizing without milling. Obviously saving on capex/opex but also importantly to purity the step usually introduces some impurities. We haven't had test results of HPA without the jet milling though so that would interest me.