Since 1974, Norlab Inc. has been the standard in Fluorescent Tracing Dyes. We were the original inventors of Liquid Powder Tracing Dye (16 oz flip top dispensing bottles.) -We own the patent on Dye Strip Tracing Dye. -We own the patent on Toilet Dye Strip, a unique product for testing toilet leaks. -Norlab offers other innovative dye products and dye solutions. We will satisfy your tracing dye need with an innovative solution. -Our Customer Service includes the strongest, most cost ...