Cauls
are found in almost every experienced
woodworker's shop. They were used by our
woodworking ancestors hundreds of years ago, and
maybe even thousands of years ago.
They're so
common that when we talk about woodworking
techniques we usually forget to mention cauls -
they're just there, like the air we breath. But
for new woodworkers, cauls can be a mystery -
"What are they used for?" and then, "How are
they made?