… 1. Electroluminescent devices, generally in the form of tapes, plates or panels, consisting essentially of : (i) an electroluminescent crystalline substance (usually zinc sulphide) … excited by an alternating current, these devices become luminescent over their whole surface and have many …
… 1. Intumescent heat expandable mineral material mat , presented … vermiculite (45 to 60 % by weight), providing the intumescent property; - Organic binder (5 to 9 % by weight), …
