How best to eliminate LP warps

I have thousands of 45 RPM records. I got 2 1/4 inch thick pieces of glass made with the center cut out for the label. I put the 45 between the glass, taped the glass together, and sat it on top of light bulb. (about 6" from bulb) I would give it 30 minutes and take it off and let it cool. It only failed a few times on the very thin reproduction 45 records. It should work on an LP.

In my audio system I have a Sota vacuum turntable and must say it works great. Basis make one that work great also.

Friend,

No! No! No1 The physics will not work for you. Once a round object is warped it is really not round w/an eccentricity of 1.0! Nothing you do will ever bring the eccentricity back to 1.0! In essence you will now have an ellipse and your lp is not round. Watch the tonearm swing and make your lp sound on the weird side. Benn there, done that! Also, too much pressure w/heat = NO MORE GROOVEs!!!!

Not so sure about that jazzguy.

Say:

1. a record is pressed as a perfect circle

2. then is warped, e.g. by heat or pressure, and assumes an elliptical shape with a warp

3. then heat and pressure could return it to a perfect circle without a warp.

Or am I missing something?

I see Jazz guys’ point, if you assume that a warp represents a local stretching of the vinyl, such that there is excess material in the horizontal plane and this forces the warp to occur. Like pavement expansion on hot days. If we assume that that is the genesis of a warp, then it must also be true that the LP will have thinned out in the region of the warp in order to produce the aberration. I have never observed such a thing, and I have never stored any LP ever under conditions that could conceivably cause vinyl to “melt” and warp in that fashion. So this is my reasoning why I also doubt jazz guy’s thesis. But I don’t doubt he saw what he saw. Perhaps the occasional LP comes from its factory in that condition, the warp having been caused by uneven heating in the press. But don’t we assume that most warps occur while the LP is in our own hands, in our own house?

Dear @jw944ts  : "  if i understand your situation, you have a very  small percentage of your LP collection with warps that concern you, BUT , when played, you dont notice a mistracking or audible problem....may i ask why you why wish to attempt to remedy this?  If its not broken, dont fix it.. "

You are totally rigth an accurated.

This thread goes around 100 posts in a thread that after the jw posts has no sense. It's the classic op style and he has the rigth to do it. So go ahed.

Regards and enjoy the MUSIC NOT DISTORTIONS,

R.