Isopropyl alcohol and CD crazing?


Someone who works in the plastic industry told me that isopropyl alcohol dries out the petrochemicals in polycarbonate, thus predisposing to crazing.

What do you guys think of this CD(CD-R?) cleaning protocol:
1) intial clean with dish soap (someone recomended Ivory liquid) and warm water.
2) quick rinse (30 seconds?) of the read side only with a dilute (10%) solution of isopropyl alcohol to remove any subtle residue.
3) final rinse with distilled water (my faucet has a Pur water filter; do you think this will work equally well).
4) no further exposures to isopropyl alcohol.

Do you think I will still run a significant risk of crazing? Also, would this crazing, if present, be visible if I look at the CD surface under a strong light?

Any insights would be greatly appreciated!
mshan

Showing 1 response by mshan

Hi Rodagent:

Interesting premise that too high a reflectivity will lead to excessive brightness; any weblinks where I can read more about this? I wonder if the same thing applies to various blank CDR media?

Both the Optrix and isopropyl alcohol sound very transparent to me, but the Optrix seemed to tilt my system into very distracting brightness (it contains optically active surfacants).

One thing that I've found is after a gentle dish soap and warm water rinse, I rinse the CD under a good amount of tap water, then run a gentle stream of water off the CD at an angle. The water runs off of the clean disc without beading, so you don't need to pat it dry with anything. The label side and edges still need to be wiped dry, but you can really get a pristine finish using this technique.