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On 9/17/18 5:24 PM, Marie O'Connell wrote: > The brown with mud color in middle is the oxide side where the magnetic > layer have ripped off. The black with the brown in middle is the backing > where the oxide has ended up. Yup, that's what a severely sticky tape looks like when it's unspooled without baking. Lots of oxide stuck to the backing. OTOH, there are lots of sticky tapes which cannot be distinguished from non-sticky tape by visual inspection. Just last week I put up a reel of 3M 996 which looked normal, and fell freely off the reel, so no sign of inter-layer adhesion -- but it sure was sticky. Fast wind got about 30 feet into the tape and stopped, with the tape solidly stuck to the non-rotating guides. A photo of that tape wouldn't tell you anything useful. -- John Chester