... % on thickness WHY CAN IT BE BETTER? 1) Light weight, waterproof, fire retardant and self-extinguishing2) Sound ... USED?1)Advertising: exhibition display, digital printing, silk screen printing, computer lettering, sign board, light box,etc. 2)Construction: ... . 1)Advertising: exhibition display, digital printing, silk screen printing, computer lettering, sign board, light box,etc. 2)Construction: ...