Operating temperature for PVC in other applications is 140 degrees max. But that's operating temperature.
If you're letting them cool down long enough I would just chalk it up to crappy vinyl material, on top of that, severe warps have great memory and are prone to want to go back to their wavy ways
The warp can be removed, but I've found that the "whoosh" is a crap shoot for some reason. Sometimes it goes away with the warp, sometimes it stays, I think it boils down to the quality of the vinyl and how the warp effects the grooves initially..............but, hey, it's worth a try
If you're letting them cool down long enough I would just chalk it up to crappy vinyl material, on top of that, severe warps have great memory and are prone to want to go back to their wavy ways
Are you using a Vinyl Flat or something else?
I was going to say, maybe bring up the heat a little bit so that the vinyl softens enough to go completely flat.............mine set to med heat runs at about 150 and I've had no issues.
For the amount of albums I've tossed in the vinyl flat for myself and others without issue, I'm leaning towards the vinyl itself. That, unfortunately, there is nothing you can do about or prepare for. I did have an album once that out of the sleeve actually smelled like oil, it was the weirdest thing, it was warped, but I just sent it back because I didn't want to take the chance. There's no real way to know the consistency of the vinyl and or formula used, this is why I caution people with colored vinyl as well.
90 minutes has been my sweet spot unless it's a really thin album.
I leave it in the pouch until is cooled.
Not many, but if it's heavy weight vinyl I stick to the same formula and so far I've run across no issues.
I just saw this @... I have a screw down clamp that came with my turntable, so the spindle is threaded. So for me, I can add a small felt washer under the record, then screw the clamp down over the record and that little washer will basically get rid of almost any kind of warp. But most tables obviously don't have a screw down clamp (although honestly I think they all should have the option.) Personally I think weights and standard clamps are not super useful on warps, they can flatten one side of a dish warp, but generally not the other.. They can't do much for edge warps, most warps I'd say they don't really work all that well. But if I didn't have the screw down I'd still have at least a weight because by all accounts the ability to press the record down against the platter does help with sound and they can still help with minor warps in some cases. And to me any help is good when it comes to warps.
Good call @Lee Newman, I forgot that @mcherry used washers with this one. This is the best clamp I've heard of (mainly from all the people here) so yeah that would be the way to go, just make sure your TT spindle is long enough for the Mitchell to work. I believe some TTs can't use it due to that.@DownIsTheNewUp a michel clamp emulates what @Mather is talking about. It's not quite as effective as there is more sustained tension in @Mather's set up. I find it to be effective on some edge warps, not all. Only the most egregious bowl warps are not corrected with it. It also has a felt washer that you place under the record. I think @mcherry made different sized washers for different warps?
MICHELL Engineering Delrin Record Clamp flattens record warps AUTHORIZED-DEALER | eBay
Black Delrin record clamp with anodized aluminum knob for use on GyroDec, TecnoDec, or third-party turntables. Get better sound from your vinyl by clamping it flat to the platter, evening out unwanted undulations and reducing resonance in the vinyl itself.www.ebay.com
