Sridhar Ayengar wrote: That's really strange, because 3M and Scotch are the same company. Peace... Sridhar ----------- Billy: 3M manufactured for dozens of companies. They would make bulk tape (usually 18" wide) for almost anyone, including the 3M and the Scotch brand name. Many companies would supply the formula for the binder, oxide slurry, and suface coating. So even though the tape came from the same production line on the same day, it could be radically different. 3M was excellent about controlling the IP. So even though they made tape to spec for a competitor, the detailed data would not reach their brand name group. At one time in the late 60's I visited their production line. They claimed that they were making 90% of all the .5" tape on the market at that time. Billy