Ultraviolet Ligh 2t
Ultraviolet Ligh 2t : General. Light waves shorter than the visible blue-violet wave of the spectrum. Crude oil, colored distillates, residuum, a few drilling fluid additives, and certain minerals and chemicals fluoresce in the presence of ultraviolet light. These substances, when present in drilling fluid, may cause the fluid to fluoresce. (Bul D11)