How much isopropanol is effective but safe for viny?

91% isopropyl is perfect to use on records. Fully soak a large cotton ball until it’s dripping wet and with a good amount of pressure wipe the record back and forth in the direction of the grooves. After going around the entire thing several times and covering all tracks including runout, get a new cotton ball and repeat the process. Keep doing this until the fresh cotton ball remains white and no longer picks up residue. Wave to dry and start on the next side. Use carbon brush several times prior to playing to clean off any small fibers.

Not all surface debris is light fluffy dust — some is gritty and abrasive. Wiping "with a good amount of pressure" worries me, it might grind that stuff in, drag it around, and premanently scar the vinyl. Have you encountered that, Invictus?

I have just spoken with Duane Goldman (The Disc Doctor) who called on a different topic.  Duane has spent his life studying record cleaning as a chemist.  Duane mixes record cleaner used by the Library of Congress and other archiving organizations.   He s VERY familiar with the vinyl compounds and record material contaminants as well as foreign materials that find their way into record and lacquer grooves.  I asked Duane specifically about using isopropyl alcohol on vinyl.  

Duane contributed the following FACTS to the discussion, but won't post. If you want to confirm this, just call him and ask for FACTS about using isopropyl alcohol on vinyl records.

Without posting his string of "colorful descriptions" of those who would ruin their records with Isopropyl alcohol, he indicated that the use of 0% of isopropyl alcohol is the acceptable threshold, but not more than 0%.  

NO ISOPROPYL ALCOHOL ON RECORDS.  This issue was resolved in the late 70's but some people still choose to ignore the actual scientific facts related to this topic.

Isopropyl alcohol does not dissolve the specific foreign material in the grooves which is the mold release and associated mildew.  

I described the @invictus005 method using cotton balls and 91% isopropyl alcohol.  He said it would leach out the plasticizers which can never be replaced.   Use  NO ISOPROPYL ALCOHOL ON RECORDS.

So the readers of this thread can either take the word of a chemist who has been studying record and lacquer surfaces his entire life or @invictus005 who is someone who can't even identify what the material is that he is trying to remove.

I do not use as I read, that overtime it can cause vinyl to become brittle. That’s reason enough for me to stay away....far away.

Here is THE question... Why do people want to use isopropyl alcohol? What factor does isopropyl alcohol have that would lend itself a great cleaning agent on vinyl records? Have the Isopropyl alcohol proponents tried/used other methods? If yes, let's hear of them and their/both long term affects.

@bpoletti

Sorry but your post makes no sense to me.

Happy Listening!

@slaw My post makes perfect sense.  Isopropanol should NOT be used on records.  Period.  It does not clean off the substances that need to be removed from the grooves of vinyl records and removes the plasticizers that need to remain on the records.