These are some observations of my current ultrasonic method. Subject to change, as always.
- Ultrasonic bath uses a mix of diluted Tergitol and isopropyl alcohol. I have not measured exact amounts yet.
- Filtered tap water for the ultrasonic is plenty good enough. Instapure R5 filtering is what I use; R8 is even better.
- Temperature between 35-40°C seems to work just fine.
- Cycles run about six minutes per rotation of the records. I do at least two cycles, sometimes three for really grimy records.
- The rinse stage includes flooding the record surface with purified water (Aquafina is just fine) and vacuuming it off.
- Records air dry for a few minutes. (This is so any remaining droplets around the edge and label will evaporate. The grooves are already dry.)
- Cleaned records go into new archival record sleeves.
Running a 12 minute cycle is about perfect–it allows ample time to rinse, vacuum and sleeve three records, and load up the pucks with another three records to clean.
I only clean in stretches of one hour. That is the duty cycle for the record vac and the ultrasonic bath.
This results in 15 records cleaned per hour.