WTransparency and translucency
WAluminium oxynitride
WArchitectural glass
WBorosilicate glass
WCalcite
WCellulose acetate
WDiamond
WFoturan
WFused quartz
WGlassine
WIce
WIceland spar
WMonopotassium phosphate
WNitrocellulose
WPliofilm
WPoly(methyl methacrylate)
WPolycarbonate
WPolyethylene
WPolyethylene terephthalate
WPolylactic acid
WPolyvinyl butyral
WPyrex
WReagent bottle
WSapphire
WSoda–lime glass
WSpinel
WTransparent ceramics
WYogo sapphire
WYttralox
WZerodur