HiFi Subjectivist ¦ Audio Forum ¦ NVA User Group

That's precisely what I'm doing.

But in using an enzyme stain remover and an enzyme record cleaner.
.

Interesting, are you using them combined?

No. I'm going to clean seperate coffee stain samples (organic stain) with them both.

Then I will move on to cleaning two records.

I assume having cleaned separate coffee stain samples (organic) you will then refresh the fluid? otherwise would there not be some "cross contamination" of the" two records"? and then of course there is the question of similar dilutions ,ambient temperature et,etc,etc

Addendum. I have found over the years the urine i have extracted on a day to day basis seems to work best.

Many years ago I worked on photographic film research.

To remove gelatin (a protein) which "held" the silver salts (and recover the silver from photographic film) we used pepsin - it works best in acidic conditions and at 30 - 40 degrees c - rather like your stomach conditions.

https://www.philipharris.co.uk/product/ ... g/b8a01879

Needs to be handled with great care - it does digest proteins!

I would guess that most enzyme record cleaners are bull, as surely the temperatures they are used at are quite low and so the "dwell time" required to digest proteins (from finger prints etc) would be longer than the time the record is left in contact with the solution?

Modern day ones can work at low temperatures.

And my ultrasonic cleaner cleans at anything up to 50 degrees. I use 35 degrees. Which is higher than enzymes in washing powder are used at for delicate washing.

Daniel Quinn wrote: ↑Fri Oct 02, 2020 2:01 pm That's precisely what I'm doing.

But in using an enzyme stain remover and an enzyme record cleaner.

Sounds like a good approach, I'll be interested to see your results.

Daniel Quinn wrote: ↑Sat Oct 03, 2020 10:49 am Modern day ones can work at low temperatures.

And my ultrasonic cleaner cleans at anything up to 50 degrees. I use 35 degrees. Which is higher than enzymes in washing powder are used at for delicate washing.

Not sure where you get your information about "modern enzymes".

Enzymes are "biological catalysts" they have been around since the dawn of life. As I said most have an optimum temperature of about 35 to 40 degrees centigrade - above this they denature (break down), below this they are not as fast at digesting.

Biological washing powders remove the necessity for a boil wash, but the enzymes (lipases and proteases) will still work, say at 30 degrees c, albeit slower than they would at optimum temperature, as they are working in combination with plenty of agitation and high surfactant concentrations.

Most enzyme record cleaners were developed/sold before ultrasonic cleaning became popular for records, so I stick by my initial thought that using them on records is bull. By all means though, go ahead and try - the link I gave will save you money (unless you are thinking of using Persil or similar )

Your conclusion isn't supported by your propositions.

You admit that enzymes can work at 30 degrees or less, yet you maintain them working in records in 'bull'

These 2 propositions do not support each other unless and until you introduce new information.