Open Sachet And Wipe Over Surface. An Immediate Blue Color Change Indicates The Presumptive Presence Of Cocaine | | Primarily Used In Bars / Restaurants / Night Clubs / Public Toilets / Other Business Establishments Committed To Identifying And Minimising On Site Drug Consumption | | Cocaine Drug Swab Tests Have An Unlimited Shelf Life - Do Not Flush Used Wipes Should Be Disposed Of With Normal Waste | | Will Detect All Types Of Purity Levels And Derivatives Of Substances Containing Cocaine Including Crack Cocaine | | Not For Use On Human Skin, These Wipes Are Only To Be Used For Testing Suspect Surface Areas | |