I am working primarily with copper and silver. Gold responds the
same way also.
There is no scrap involved. The metals involved are sheets that are
being reduced for specific projects. I teach everyone to anneal the
sheets before rolling. I also anneal before changing directions and
teach that as a necessity to avoid cracks. I am strong enough to
maintain an even roll, unless there is a heavy reduction on a wide
sheet. The problem still is there either way.
The one thing that does seem to help is to have the assistant
support the metal as it comes out of the rollers.
Maybe I need to sacrifice someone from the sales and use tax
division or the local zoning board before starting a project. The
bench gods do request strange things from time to time.