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Hi cynthia, The tanks belong to david ruth I don't know the type We will set up the process in his studio in oakland or in sacramento. I have sent pieces to tiffin in the past but it is. Always a hassle They do not do runs regularly and once shipped a piece back to me that was poprly packed and brok...

I am trying to find someone willing to teach me how to acid polish crystal with hydrofluric acid. I have the tanks and have tried to find papers written on technique but have been unsucessful. Can anyone direct me toward literature or people familiar with the technique. Thanks
Larry