A History of Ultrasonic Record Cleaning

Given all of the attention to ultrasonic cleaning of LPs, made more accessible by DIY, there’s been surprisingly little written about the history of ultrasonic record cleaning. Mike Bodell changes that with a piece I just published entitled “The Curious Case Of Record Cleaning In The Quest For Sonic Perfection," which you can find here:
https://thevinylpress.com/the-curious-case-of-record-cleaning-in-the-quest-for-sonic-perfection/
Mike found an old patent that directly addresses the subject, and puts the development of various cleaning approaches into historical context. I think you’ll find it a worthwhile addition to the literature and an enjoyable read.