Thank you thank you everyone!!
After more research I do think it was partly a temperature issue, copper needs high temps to burn out and for the glaze to move and run. I alos used my gas Port-o-kiln which is desigend to rapid cool unlike the wood kiln I had used before.
This batch of glaze had been tested in a kiln run off gas and also waste vegetable oil (a very experimental sustainable kiln), in oxidation , and it came out perfectly transparent, shiny and green.
I definitely did not go into reduction, I have fired this glaze in reduction to cone 10-11 and it goes a marvellous shiny spotty glossy red.
The matt metallic black was a surprise.
MY QUESTION (for those how know a bit about glaze chemistry and heatwork)
Will the metallic black burn off if I refire to cone 12-13 and cool slowly?
I am thin on time, so I want to crowd source some advice to make the smartest move.
I have attached screengrab of the original wood-fired green pot and my misfires black pitchers. Both were lined with Tenmoku.
THANKS!