VARIOUS WELD CONDITIONS

(①Lens not used) The blue-gray is the color of the weld which shows that the weld has a problem.

(②Excessive Welding Current) The thin weld color is close to blue gray, this shows problems in the weld.

(③Excessive Welding Current) This will produce undesirable look.

(④ Without a back sheild) The white shows the oxidation, which means that the weld strength has decreased considerably.

Silver　This is the sign of a perfect weld, free from any weld defects.
Gold/Blue　A near perfect weld without any weld defects.
Purple/Blue　Some signs of ductility on the weld surface. But, almost no influence in the metals quality characteristics.
Blue/Gray　A considerable weld defect. The sheet welds ductility has considerably decrease.
White/Ash Yellow　Bad condition, the weld is fragile.