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Unread 05-31-2018, 04:56 PM   #68
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Bill Graham
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I will add: I've tried Dale's repeated brownings until a strong contrast develops technique. I have never had a strong contrast develop. As stated earlier, I don't have logwood in the process. When I decide to boil (I use a steam system), the barrels are completely black; no pattern developed during browning, so no pattern was present after converting the rust.

I don't see how the carding between brownings takes off the rust on the steel but leaves it on the iron, unless the pre-etch makes that possible. There is a good bit of debate about pre-etching being worth it or not. I could be wrong, but I thought that Dr. Gaddy abandoned pre-etching.
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