May be it has something to do with air in the wood. Punky wood seems to be
much more porous than solid wood. More area of exposure to air for the
glue.
Tony Manella
ndd1"at"prolog.net (remove "at")
http://home.ptd.net/~ndd1/
Lehigh Valley Woodturners
http://www.lehighvalleywoodturners.com/

"George" george@least wrote in message
...
Yep, I read that, too. So why only when punky? Lignin eaten away, maybe?

"Kevin" wrote in message
...
There is some information on Russ Fairfield's page
http://www.woodcentral.com/russ/finish4.shtml

where he states it is the cellulose that acts as an accelerator. This
is
the section titled:
Hardening The Wood with CA Glue