A brilliant article that I have only just come across - thanks Adam D!
Missed this first time around in 2006, so thanks for "stickering" it.
Pot making is quite an art, but the very last para on platinum coated pots is of particular interest and something Chance Brothers also experimented with to achieve a better quality optical glass. I'm going to have to read this through carefully as it might be in my interest to extract certain sections for a future book. Acknowledged as always.