What is the CMC for the Tergitol?
Record Cleaning Machines
Has anyone out there done an A/B comparison of the cleaning results or efficacy using the Degritter ultra sonic record cleaning machine which operates at 120 kHz/300 watts and an ultrasonic cleaner that operates at 40 kHz/300 or 380 watts (e.g. Audio Desk; CleanerVinyl; the Kirmuss machine; etc.)? I have a system I put together using CleanerVinyl equipment, a standard 40 kHz ultrasonic tank and a Knosti Disco-Antistat for final rinse. I clean 3 records at a time and get great results. Surface noise on well cared for records (only kind I have) is virtually totally eliminated, sound comes from a totally black background and audio performance is noticeably improved in every way. Even though the Degritter only cleans 1 record at a time, it seems significantly easier to use, more compact and relatively quick, compared to the system I have now. I'm wondering if the Degritter's 120 kHz is all that much more effective, if at all, in rendering better audio performance than the standard 40 kHz frequency. I don't mind, at all, spending a little extra time cleaning my records if the audio results using the Degritter are not going to be any different. I'm not inclined to spend three grand for a little more ease & convenience and to save a few minutes. However, if I could be assured the Degritter would render better audio performance results, even relatively small improvements, that would be a whole other story.
- ...
- 111 posts total
I have used the
P4875(II)-4T-NH (isonicinc.com) for a year now. Have cleaned about 750 LPs and have been generally satisfied with the results. While the system will accomodate 10 discs at a time, I have learned that doing 2 at a time lets me space them apart and gets better results. I think the machine gives good value for the price. One thing I have stopped doing is ever touching the surface of a cleaned disc with a brush (carbon or otherwise) or any other surface cleaning devise. I gently blow off the surface before playing. After spending all the time cleaning a disc, that last thing I want to do is push any surface particles down into the grooves with a brush. Makes sense? |
@mijostyn, Tergitol 15-S-9 as shown in Chapter IX, Table VII the CMC is 52 ppm. WRT to the Degritter - per XIV.7.d Dow™ Tergitol™ 15-S-9 at a solution concentration of about 150 ppm (0.0150%) and 2.5% IPA did not initially produce foam, but after successive cleaning cycles began producing foam. Reducing the Dow™ Tergitol™ 15-S-9 to a concentration of about 80 ppm (0.008%) and 2.5% IPA significantly reduced foaming and still showed excellent wetting. Also, per XIV.7 Degritter™ UCM: The following summarizes some results of various chemistries with the Degritter™ UCM that were addressed at the Steve Hoffman Forum™ Degritter Users | Steve Hoffman Music Forums. The Degritter™ because of how it pumps-down the tank for drying; pumps-down the reservoir for cleaning; and primes on start-up is sensitive to pump cavitation and producing foam so nonionic surfactants that can foam are used at very low concentrations mostly just for ‘wetting’. All is in the book. |
- 111 posts total