Re: New grid bias battery artwork available.
Hi,
When I made that replica, I had not yet identified the source of 'red pitch'. I had 2 part urethane casting resin and the appropriate red dye to mix-up something that was pretty close. I later discovered where to obtain red pitch. It is used as a backing material for gold and silver tooling 'chasing'. You should be able to find a jewelry/metal-smithing supplier. It is sometimes called German pitch. If you see hardness grades listed, get the hardest grade. It melts at 115 to 130 C. You can do that with a heat lamp without damaging your graphic.
Hope this helps.
Within the month I will start on making 80 batteries for the RCA Radiolas of 1924-26. Each radio requires 8 or 11 batteries. A lot of work....
Robert
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