What is this called? The pointers mark a subtle, darker spiral of coloring that appears the length of the tubes. Since it's regular and goes throughout each ribband section, it must have been intentional, possibly by using strips of a slightly different steel composition when the billet was stacked, in order to bring out this feature. To me, it looks like the steel in one of the three irons was intentionally different to create this effect.

This is usually not brought out when using the Original Parker Process, but is visible when I use my "German School" process, designed to bring out maximum pattern detail. These Parker Grade Three tubes were shot under fluorescent light, the feature is much more prominent in daylight.

Regards
Ken


Last edited by Ken61; 06/12/17 12:54 PM.

I prefer wood to plastic, leather to nylon, waxed cotton to Gore-Tex, and split bamboo to graphite.