(PS: Good tip on the parchment paper.)
Just make sure you are using parchment paper and not wax paper - ask me how I know.
@Tom1956: The Council was formed a bunch of years ago to sorta keep tabs on trolls, fights, and other issues that arose from time to time among members. When those issues were identified, the moderators were informed and they would alert the death squads! ;)[/QUOTE]
Thanks. Let me know if you need another enforcer. I'm sure we can arrive at a reasonable rate per hit. I've devised all sorts of innovative ways of taking care of spammers and scammers. You track their location and send me my assignment. Satisfaction guaranteed. In fact that's our motto: "You track 'em, and we whack 'em".
I'd just like to add to Johns' comments. For our diligence and service we are each rewarded with a reserved parking space at headquarters in New Zealand and eat lunch in the Executive dining room while their.
How about the old-timer's stand-by?
Hairspray (very) lightly applied across the cover glass for clamped contact prints. A single can of spray (a lifetime supply) sure beats the cost of large sheets of AN glass. Especially if you accidentally break them. And the coating is easily removed and reapplied too, if needed.
I agree with Ken. I installed thousands of slides to the drums of drum scanners and I know much of the art. But vaseline , paraffin , sprays are good methods to apply on clean quartz tubes. Because they are very easy to clean. But when it comes to spraying or oiling expensive gear , may be things changes.
Speaking of parchment paper, it makes a decent emergency ground-glass substitute. It's especially good for checking infinity focus on old rollfilm cameras: cut a strip a couple feet long to the width of the film you're using (in this case it was 3-5/8" for 122), spool it on a pair of spools, and wind it tightly. Then open the shutter and focus right on the paper.