Double Your Invisibility with Yo-Zuri H.D. Fluorocarbon Disappearing Pink. Yo-Zuri H.D. Carbon™ is a fluorocarbon leader that maximizes the advantages of fluorocarbon with a Disappearing Pink tint. Fluorocarbon is virtually invisible in the water and red is the first color to disappear in the water column. Pink is the lightest shade of red and as a result disappears the quickest. Fluorocarbon is also only invisible until it gets nicked or scraped. If this happens, that nicked section of the leader actually lights up from the sunlight becoming highly visible. The color pink added to the line helps greatly reduce this problem.