This reply is a little late but....regarding the UV thing. Polycarbonate used for optical purposes (eyeglass lenses) always has excellent UV absorbing characteristics, but contrary to popular belief, this is not intrinsic to the material. It is added in by the raw material manufacturers. So weather or not the poly used in CD's has any UV absorption is anyone's guess. However, considering that many brands of CD blanks hype having an extra UV protection layer, my assumption is that the poly normally used does not.
On an interesting side note: many car headlights are made from polycarbonate these days (because of it's impact resistance) and have the UV protection. But remember Ford and Volvo cars from the '80's and how their headlights would become extremely hazy and cloudy after a couple of years? Well, they didn't have the UV protection. David Crandon Philip Stortz wrote: > > that's why i had them in the window for a week, they got several hours > of sunlight a day, although i know from using the sun to make circuit > boards you get most of the uv around high noon (although at 5000+ feet > we do get more anyway). i'll have to try it on my uv board exposer this > summer in my "workshop" (i've got a uv source designed for exposing etch > resist on circuit boards). it might well destroy them more quickly, as > uv often does to many things. i suspect the different dyes might be > substantially different in this regard. i do note that sony claims 100 > year stability, assuming it's in the case, i assume that's because of > the uv or ir problem. then again i think the plastic is polycarbonate, > which i believe is fairly tolerant of uv and blocks it fairly well, > although there is very little plastic between the dye and the world. > ps, i know it absorbed a great deal of water as it initially floated > after being unwrapped, after a few days it sunk. > > "Eric D." wrote: > > > > on 13/5/02 04:14, Philip Stortz at [EMAIL PROTECTED] wrote: > > > > > drying out completely it again was flawless. cdr media is fairly > > > indestructible. cd r/w media may be another story, i never tried it do > > > to the cost difference and my preference to ideally keep all my backups. > > > > It's a pity you didn't do the UV test ;) You may find that leaving the > > CDR/CDRWs sitting in sunlight (even if it's cool out) will destroy them very > > rapidly (it'd be interesting to find out). > ---------- > > -- > Philip Stortz, mad scientist at large. --Every 13 seconds an American > gun owner uses a firearm in defense against a criminal. gun ownership > deters crime, it doesn't increase it. gun control increases crime and > cost lives. <http://www.pulpless.com/gunclock/framedex.html> > > -- > G-List is sponsored by <http://lowendmac.com/> and... > > Small Dog Electronics http://www.smalldog.com | Refurbished Drives | > -- We have Apple Refurbished Monitors in stock! | & CDRWs on Sale! | > > Support Low End Mac <http://lowendmac.com/lists/support.html> > > G-List list info: <http://lowendmac.com/lists/g-list.shtml> > Send list messages to: <mailto:[EMAIL PROTECTED]> > To unsubscribe, email: <mailto:[EMAIL PROTECTED]> > For digest mode, email: <mailto:[EMAIL PROTECTED]> > Subscription questions: <mailto:[EMAIL PROTECTED]> > Archive: <http://www.mail-archive.com/g-list%40mail.maclaunch.com/> > > Using a Macintosh? Get free email and more at Applelinks! > <http://www.applelinks.com> -- G-List is sponsored by <http://lowendmac.com/> and... Small Dog Electronics http://www.smalldog.com | Refurbished Drives | -- We have Apple Refurbished Monitors in stock! | & CDRWs on Sale! | Support Low End Mac <http://lowendmac.com/lists/support.html> G-List list info: <http://lowendmac.com/lists/g-list.shtml> Send list messages to: <mailto:[EMAIL PROTECTED]> To unsubscribe, email: <mailto:[EMAIL PROTECTED]> For digest mode, email: <mailto:[EMAIL PROTECTED]> Subscription questions: <mailto:[EMAIL PROTECTED]> Archive: <http://www.mail-archive.com/g-list%40mail.maclaunch.com/> Using a Macintosh? Get free email and more at Applelinks! <http://www.applelinks.com>
