"Eigenvector" wrote in message
The sources that I've read, and actually there are quite a bit of them,
all say that a green flame indicates the joint is ready. It does seem to
work that way too, the solder typically doesn't melt until that point is
reached.

Some years ago I worked at a place where they did production soldering of
joints. Thousands of joints per day. No one ever used a green flame as a
guide.

Nor have I ever seen a Bernzomatic heat up a joint in ten seconds,
especially for the lead free solders.

Practice a bit more and heat a bit more.