record cleaning findings/puzzle


Hello Gentlemen,

I have been experimenting today with steam cleaning my records. I am looking for support of my findings.

I used 2 identical records ( as well as others ) one I cleaned with the vpi 16.5 and my homebrew 25% isopropyl(99%), 75% distilled water (pharmacy)

Steps

1.Mo-fi brush one 2-3 cycle with cleaner, vacuum 2 cycle
2.audioquest brush, distilled water rinse 2 cycle, vacuum
3.Play

(The brushes were just ones I had around, I did not pick these for any particular reason)

The other record was cleaned with the same brushes, same method, but I also used the hand held steamer during steps 1 and 2. I kept the steam on the record 2-4 inches away, for duration of scrubbing.

I assume there is a sonic print to my solution, is achohol typically bright/harsh sounding?

Between the 2, at first I found the steamed ones to sound more organic, maybe slightly rolled off in the highs, but just warmer and more detailed everywhere else except the highs.

When I play the Alcohol only, cleaned record the highs are more present/forward, and noticeable, but upon further listening I notice a lack of depth because of it. trick details.

Here's the good part:

I then switched the cleaning methods for both records ( and others as well) and the sonic footprints followed each method onto each record. I did this back and forth 3 times with this pair and four times on another single record.

I am assuming I am hearing my solution, but could the steam somehow be reacting with my brushes and maybe melting them, or leaving something I am hearing on the surface which is damping the highs. At first I thought I wrecked the records, then I started to notice the inner details in the rest of the spectrum other then the highs, and when I added my solution again, the highs came back, now sounding to strong and glaring.

Which is the real sound of this record?
Has anyone else found this too?

Thanks,
Mike
hanaleimike
i have found steaming does improve the quality of the cleaning regime i use but i do not use it on all applications. I also use a home made version using alcohol similar to yours and find it effective especially with steaming. IMO, the steaming raises the temperature of the cleaning fluid slightly thus making it more effective. The alcohol primarily reduces the surface tension and allows the fluid to get deeper into the groove. It does aid in evaporation, but i think that is a minor attribute especially with vacuuming. I also think the use of good brushes are a key to cleaning. a brush that has the microfibers that can extend deep into the groove improves cleaning. Now having said all of this, i find the highs more improved with deep cleaning than anything else. If you have ever pick up a dust ball or little grundge on the stylus, you probably noticed it when the highs got lost or distorted. So i echo dougs comments that if a cleaning regime produces brighter highs, it is more effective.
It is quite common for solvents sold as spectroscopic-, HPLC-grade, or even higher purity to contain significant levels of contaminants that remain behind after evaporation. These contaminants are detectable in electron or scanning-probe microscopy experiments as nanometer-sized, or larger, background deposits. For critical applications solvents are typically redistilled in an all-glass apparatus shortly before use and may sometimes be stored under nitrogen or argon. I do not know whether trace contamination is contributing to what you are hearing; however, one should be aware that even "highly purified" solvents, including ethanol or isopropanol, are often carriers of impurities.
>>09-26-09: Oilmanmojo
The alcohol primarily reduces the surface tension and allows the fluid to get deeper into the groove<<

Incorrect.

Surfactants, not alcohols, by definition (Surface Active Agents) reduce surface tension of solutions and are better known as "wetting agents". They allow the solution to penetrate deep into the groove.

Alcohol's purpose in record cleaning solutions is basically for drying. Surfactants and enzymes do the digging.
To Hifitime: I repeat - the small molecule plasticisers that alcohols may dissolve out from PVC products are not present in the PVC used in LP manufacture. To find out what plasticiser is used in records, re-read your Canadian site reference. This species is no more alcohol-soluble than is PVC itself. Pay a little more attention to what you read on Wikipedia.
I'll second Maclogan's assertions with reference to alcohols (at least the small lecule alcohols such as IPA)dissolving the high molecular weight plastizers, di-octyl phthalate being one of them, that are used in the PVC used for records. It doesn't happen!
One would have to be using the alcohol from which the plasticizer (an ester)is made, in the di-octyl phthalate case, 2-ethyl-hexanol.

Salut, Bob P.