Teeny a couple of points you may be able to help me with:
if you thouight I meant to completley take a section of cable apart strand by strand then I said it incorrecty Let me try again ,maybe that will help. I weld both ends up with an electric welder..then with some heat in the piece i untwist quite a ways to spread things open...then i wire brush. Then with a little heat i twist it back close to how it was at start. A little flux is a good thing when you do this retwist.
And,,,if you have removed all of the oil and grease...how can that then make a difference in the contrast?
My thoughts on the contrast is that since all of the metal in cable that i am aware of is the same metal. there is no contrast. Wot I see for the finished product is there is dark lines at each welded seam. To me that is a line showing decarb. The outer layer of each strand that we cannot keep clean while forge welding.
i have already stated that I am not fond of forge welded cable for my knives..But i have to admit that some of the knves I have seen on this site are really nice pieces..look great.