Tim Williams wrote:

...
OT: how do you get the weld to show up like that? My experience with forge
welding has been clean joints...

The joints are clean, but they are between meteoric iron and
I-don't-know-what. Whatever etchant he used affects the metals
differently, both for depth of etch and coloring.

I once did a 65-layer piece with wrought iron and truck spring, I used
Ketchup as the etchant. Almost no depth to the etch, but great color
difference between the metals.


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