HP Forum Archive 16

[ Return to Index | Top of Index ]

Case yellowing - interesting read Message #1 Posted by Frank Boehm on 13 Jan 2007, 10:21 a.m. http://www.vintagecomputing.com/index.php/archives/189 (to sum it up: you can slow the yellowing, but once it's there, you can't do anything against it...)

Re: Case yellowing - interesting read Message #2 Posted by Katie Wasserman on 13 Jan 2007, 10:58 a.m., in response to message #1 by Frank Boehm Thanks for that pointer, right up my alley! HP mostly used dark plastics for their old calculators, but yellowing is often a problem on the Woodstock and Topcat cases. It's a bigger problem on the 9815 case, the plastic seems really "cheap" and is very light in color. I like the sidebar on the Magic Erasers, I need to give them a try when cleaning old calculators. I usually use Novus #1 plastic cleaner along with 99+% isopropanol to get off the really nasty stuff like ink stains.

[ Return to Index | Top of Index ]

Go back to the main exhibit hall