Zonie said:
When I said I etched the barrel, I was speaking of the underside where it wouldn't be noticed.
I did it only to see if there actually were laminations of different steel twisted around or if it was just something phony done to fool people.
I was referring to his close-up picture in which the striping is apparent. To me, it is evident that it is not a phony effect.
In simulated damascus steels, the faux damascus effect is created by applying an etchant onto the surface in a zebra-stripe pattern (or, in some cheapo fake damascus knives, it's stamped into it). The steel itself is all one homogenous color, the etching technique just selectively erodes the polish and affects its reflectivity.
In a genuine pattern-welded barrel, the steel is not homogenous. Most simply, it is a spiral of steel that has been forge-welded into a long, solid tube. The carbon picked during the forging process doesn't diffuse evenly throughout the barrel. The carbon content of the steel at the "seams" varies from that of the steel between them. (Yes, Dan...duh...we know this...what's your point?)
Anyway, my point is that the pattern welds not only give the steel a variegated hardness (and erosion resistance), but also a variegated color. Even when polished uniformly, the color variation in the steel is often detectable.
In the photo, it looks to me like the stripes are, at least in part, due to variations in color of the metal rather than just variations in reflectivity.
Dan