[78-L] Re; Dewarping 78s

[Glenn Longwell]

My personal experience using the oven works fine.
 
I put the oven at 225 degrees and place a record on a flat cookie sheet.  Depending on record type, 3 to 4 minutes later the record is soft enough to relax to be flat on the cookie sheet.  Then slide the record off onto the counter to cool.  I always put something on top of it so the edges don't bow back up.  The temperature differences of the counter and air side will make the record want to bow a little during cooling and this stops it.
 
This method comes with a major warning. Every oven is different.  I have never actually put a thermometer in the oven to see what the temp actually is.  The 225 setting is higher and the time longer than I've read elsewhere but that's what works for me.  So you'll need to do some test cases on some less expensive records.  The record will go from not soft yet to stuck on the cookie sheet in short order if you aren't paying attention.  This method is also a lot faster if you have many records to dewarp.  When I get set up I usually do about 20 before I get pretty bored of the task and move on to something else.
 
Glenn

--- On Sat, 1/16/10, Ken Matheson <kenmath at yahoo.com> wrote:


From: Ken Matheson <kenmath at yahoo.com>
Subject: [78-L] Re; Dewarping 78s
To: 78-l at klickitat.78online.com
Date: Saturday, January 16, 2010, 1:23 PM


You will probably get many responses on dewarping 78’s, but here goes. I have 2 pieces of plate glass both 12 inches square and a quarter inch thick. I put the 78 records between the 2 pieces of glass and place it near or over a heat register or near the stove about 6 inches or 1 foot above the floor. A plant stand works good. In the summer some people put them on the dash of a parked car with the windows up. Do not add weight, just use the glass only. It takes 2 to 4 days depending on how warm your house is. I must stress, Do not add weight. Good luck.


      
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