I have told you already in my last reply, it is meaningless for further debate on this. Your speculation based on your jacket, mine based on my research. If it is stained with black instead of pre-sealing on the core, grey core, tea core, red core is pointless. And expecting fast aging and color change is pointless too. Anyway, this debate ends here.
This isn't a debate, i am merely correcting the incorrect information you have been posting.
I have not speculated, only posted facts based on my observations, facts that are confirmed directly by FW as stated by @58panheadfan.
Meanwhile your "research" is contradicting itself...
But sure, let's end this "debate" here.