David Nebenzahl wrote in .com:

Just bought some PT lumber today. Both Home Despot and the local
lumberyard had the same stuff: dark brown. Looks kinda nice, actually,
kinda like it's pre-stained. (Didn't buy at Home Despot 'cause all they
had were 20' lengths in most sizes, whereas my
only-slightly-higher-priced local yard had 8s, 10s, 12s, ... FAIL!)

Does anyone know what the chemical agent is in this new brown stuff? I
assume it's less toxic than the bad old copper arsenate.



That "bad old copper arsenate" was effective, cheap, and far less toxic
than the current scare stories would have you believe.



Like they say, it looks like brown is the new green.




Some info in this PDF, from the USDA:
http://www.fpl.fs.fed.us/documnts/techline/whats-in-that-pressure-treated-wood.pdf

Your brown wood is probably the same sort of brown coloring
they use to decorate mulch, overlaid on regular green non-copper PT.


--
Tegger