Probably the worst thing to ever come out of my country... haha
And what they say there is a bit of a lie. They didn't use it mainly to reduce grain, they used it to remove dirt. It would've been better if they had just cleaned the interpositives before scanning them.
I wonder why the interpositives used for the GOUT was so rough by the way? Shouldn't they look cleaner than the theatrical prints, being two (is this correct?) generations closer to the negative? Just look at all those glue marks between almost each shot shift, especially in ESB. It's like they let some kid cut and glue it together.