I asked them about the different ways of cooling them. He said the nitrogen was more controlable. They found that the cooling was so sensitive to the final hardness and nitrogen gave them more control. I thought they dumped it in oil also.
I got a call from them today and said they were done. They look "PINK", I mean purple :LOL:
I was curious if they would polish also so I just ran over one leaf and it seemed ok. I will do a more serious effort tomorrow..
Ken

