> The production method is so poorly documented only a fraction of the samples being made shows any interesting properties. I have understood that rather, the

> The production method is so poorly documented only a fraction of the samples being made shows any interesting properties. I have understood that rather, the production method is poorly known even to the Koreans themselves, and also they have only a small success rate in their samples. So it's more that the Koreans themselves are not entirely sure what "makes it click", and you can't document it well because you don't yourself know all the details.