|
An optical surface has next to nothing to fear from pressure applied to it tangentially from a porous non greasy medium such as paper. The self same optical surface has plenty to be worried about by an errant compass point striking it or a rough felt tip point accidentally scoring its surface past the shadowed zone. You're happy with those risks and that's just dandy. I personally feel that the method has inherent dangers sufficient that and I would not be willing to recommend it as a How-To to a general audience; but that's the icemans problem and not mine thankfully.
|