Richard Raffan wrote a book called 'Turned Bowl Design'. I got a used copy from Amazon. I assume the book copyrighted in 1987 is out of print by now.
The reason I am posting this is the book talks about using templates as guides to doing bowls. I just did 6 rough bowls using a template made from cardboard. I drew a picture of the bowl shape I wanted and cut it out. The negative of the bowl (Raffan's term) is the template. He also says be sure to turn off the lathe before touching the template to the bowl you are trying to create.
Perhaps the real experts can make all their bowls look alike but it appears templates can be a real help to the rest of us. I have seen pictures or videos where people drew on bowls logs with crayons but have never seen any source besides the book where templates were mentioned.
Has anyone else seen any mention of templates?