@jtimothya
Hello JT. What I was trying to say is, not only is there no evidence of damage from US, there is evidence of no damage from US. Since the latter is a stronger statement, perhaps it is more accurate in some sense. That’s all. Both Slaw and I have done such tests.
From my post of March 6:
Methodology:
1. Wash both sides with VPI 16.5.
2. US clean both sides for 5 minutes.
3. Turn off the motor, so that one sector of the record remained in the US bath.
4. Cooked the record in US for an hour.
5. Removed the record from the bath, and rinse.
6. Play on a high end system, expecting a change every second or so.
7. Observed no change or difference of any kind.
8. Concluded that US does not damage vinyl.
Of course, after cooking in the hot bath for an hour, the record was warped - but that is a function of heat unevenly applied, not US energy.
My US cleaning process:
1. Rotate at 12 RPH.
2. Clean at 80 KHz with Elmasonic machine (German, lab grade).
3. Chemistry is 2.5% VersaClean from Fisher Scientific.
4. Temperature is 45C.
5. Rinse heroically.
I applied my usual US cleaning process for the test, except that the temperature began at 45C and rose considerably, and ceased rotation as noted.
Thanks for your interest.
Hello JT. What I was trying to say is, not only is there no evidence of damage from US, there is evidence of no damage from US. Since the latter is a stronger statement, perhaps it is more accurate in some sense. That’s all. Both Slaw and I have done such tests.
From my post of March 6:
Methodology:
1. Wash both sides with VPI 16.5.
2. US clean both sides for 5 minutes.
3. Turn off the motor, so that one sector of the record remained in the US bath.
4. Cooked the record in US for an hour.
5. Removed the record from the bath, and rinse.
6. Play on a high end system, expecting a change every second or so.
7. Observed no change or difference of any kind.
8. Concluded that US does not damage vinyl.
Of course, after cooking in the hot bath for an hour, the record was warped - but that is a function of heat unevenly applied, not US energy.
My US cleaning process:
1. Rotate at 12 RPH.
2. Clean at 80 KHz with Elmasonic machine (German, lab grade).
3. Chemistry is 2.5% VersaClean from Fisher Scientific.
4. Temperature is 45C.
5. Rinse heroically.
I applied my usual US cleaning process for the test, except that the temperature began at 45C and rose considerably, and ceased rotation as noted.
Thanks for your interest.