Wilson Spectra Curtain constitutes the near ideal transparent welding curtain, exhibiting good visibility, minimizing the arc glare better than any other transparent welding curtain, and reflecting usable light back into the work area. No other transparent welding curtain material manipulates light waves like it. With its special patented PVC formula, "Spectra" absorbs, scatters and filters the light spectrum to create a safer working environment for the welder and surrounding co-workers. Spectra Orange materials are available in 14-mil and 40-mil thickness for the manufacture of screen panels or curtain applications. Our unique electronic hem sealing process and self-material grommets create a stronger product than a sewn curtain process does. All Wilson Industries transparent vinyls meet or exceed the testing of the California State Fire Marshall.