It would appear to me that J and C's Polywarmtone might be repackaged Forte Polywarmtone Museum weight (I don't know of anyone else making a 320 gram paper). And I guess Polywarmtone Chamois might be Forte Polywarmtone Art. Both at a great price, and I'd love to give J and C any support I can. Has anyone tried it?
I just finished my first run of Forte Polywarmtone Museum, and really liked it. In selenium, it takes on a subtle red hue if you get it at just the right time. Wait too long, however, and it goes way red.
I asked J and C, but understandibly, they can't say; license agreements, I guess.