Section 39.581. Shields

(a) Shields shall bear some permanent distinctive marking by which they may be readily identified. They shall be capable of withstanding sterilization.

(b) Shields shall be made of material which is a nonconductor of heat and electricity.

(c) Windows shall be made to conform to the specification in § 39.575 (relating to windows of masks).

(d) The shield shall be so formed that it fully protects the face of the operator and curve back on each side beyond the ears. The shield may be pivotally mounted on an adjustable headgear, so arranged that it may be tipped back or over the head of the operator when not in use. If shall be so mounted as to be not less than 2 inches (5.1 cm.) from the eyes.

(e) The face protector may consist of a shield of opaque material which is a nonconductor of heat and electricity arranged to be held in the hand. It shall be of such size and so shaped that it protects the face from all direct radiant energy and shall be provided with an opening fitted to carry windows, single or multiple.