Can’t tell what book that is, but this is old tek, a heat press is a much better way to make rosin...
I won't wonder if This thread inspired the rosin tec.History right here ^^^
I went down a rabbit hole when I found this thread. It seems like in general the stainless steel bowl method was known and utilized in Cali before this post was made. I think the OP discovered the method from an older head and will forever be credited with putting this idea out to the masses on the web.I won't wonder if This thread inspired the rosin tec.