Proper eye protection is important when melting platinum, since the ultraviolet light emitted by the glowing melt can damage your eyes. Use only lenses that are approved by the federal Occupational Safety and Health Administration and comply with American National Safety Institute standards. A #10 welding goggle is the absolute minimum protection for the caster, and we generally recommend a #11 or #12 lens to be safe. Do not, under any circumstances, use regular sunglasses or other dark lenses! Any jewelry tool supplier or welding supply house can provide you with the proper eye protection, as well as gloves and a leather apron-two other important safety items.