by SteveFury »
Sat Nov 09, 2013 9:37 pm
I recently bought a batch of about 700 45's from Craigs List. I went through the whole lot to determine quality. In fact finished the last record yesterday, spread over several weeks. Potential candidates were washed and this is the method I used which worked pretty good.
I used an old 60's style school phonograph to spin the record, a tall cup of water/Dawn dish detergent and two $1.00 brushes from the dollar store. Both brushes are for applying makeup, new and clean. The main cleaning brush is a face powder brush. The bristles are extremely soft, fine and very densely packed. They seem to be made out of a form of maybe nylon... they don't go limp and hold their form when wet.
The second was a nylon maskera brush. One side had a plastic comb which I didn't use and the other was a single row of harder nylon bristles.
I first inspected the record for obvious defects like scratches. Scratched ones got tossed.
Then I used my regular desktop phono to *briefly* sample two areas of the record. First was the lead in area and a few seconds of the content, then a few seconds of the last 1/8th inch or so of the content. I was mainly listening for repetitive pops and noise at the beginning of the record. Random pops were usually dirt which could often be removed but repetitive pops indicated scratch damage.
I would also listen carefully for fuzzy distortion toward the end of the content since that is where the most of this type of damage occurs. I would listen carefully for any obvious changes in the tone of the content from the two samples. The main point was to determine if the record was worn out or damaged by dirt.
Worn out records got tossed.
If the disk passed that first audio test then I'd put the record on the cheap 1960's school turntable then turn it on set to 78RPM, then dip the soft brush into the soapy water and shake it a bit to dislodge any previous dirt. I worked the very tips of the soaking wet soft bristle brush using very light constant pressure into the grooves from the record's edge toward the center and almost touch the label at the pick-up groove, turning the brush from time to time. How dirty the record was determined how long I'd brush it out.
Then I'd stop the turntable, flip the record over and start it turning again to do the other side.
Once both sides were done then I'd stop the turntable, remove the wet record and take it to the sink. I was able to aim the "wave" of the water to just miss the label as I rotated it in the flowing water for both sides.
I played the entire record (Also recording it as a mp3) and carefully listened for defects. Maybe 5% of my cleaned lot got tossed for pops or worn grooves.
If I really liked a particular record but it still contained random pops then I'd wash it a second time. I'd use the maskera brush since the record was about to be tossed anyway. I'd put the maskera brush parallel onto the soapy wet rotating record so all bristles were in contact at about 30 degree angle. I'd start at the outer edge and use very light pressure running it from the outer edge to the pickup groove. Followed again with the soft face powder brush.
I'd let it dry and test it again. The maskera brush was able to clean out and save a big number of records which were otherwise junk.
It was a very long process to do all of this but I feel it worth it. I am confident I am not grinding down records and needles in dirt.
But I'll probably either make or buy a machine to do it next time.
If you're curious, I was able to pass about 200 records out of the lot as clean playable good records. Given that, I paid about ¢36 each. Not too bad.
I had kept a bunch of records which were very playable but not quite up to my personal quality standard. Maybe another 300 or so. I plan to flip those back on craigslist for a couple bucks giving a full accurate description of their condition to potential buyers.