|
Audio Asylum Thread Printer Get a view of an entire thread on one page |
For Sale Ads |
71.212.1.234
I did a quick look at recent postings on using a tile record tile sandwitch, placed in a preheated oven at no more than 250 or so F for roughly 20 minutes.Well, I did just that with a warped Kraftwerks LP but since I have a roughly 15 Y.O. 20" Apt stove and think the temp possibly a bit high, I ran the temp lower than I normally would and placed the thing in the oven and closed the door for 20 minutes, came back, turned off the oven, propped the door open to cool down and while it was on, I turned the temp down a bit further but since I have a pizza stone to keep temps more on an even keel, may not have helped the situation as when I finaly check the cooled LP, it was badly deformed, but flat. Infact, it's totally out of round and a bit less than 12". :-(
Thus, my Kraftwerks LP is no totally unplayable.
*sigh* will do it at an even lower temp I guess.
Follow Ups:
Part of my cleaning process includes a nice steam bath. I apply steam using a hand held steamer with a record weight on the record. Minor warps are corrected.
I was returning a coverless/sleeveless record that I borrowed from a friend and left it sitting upright on my car seat for a few minutes on a sunny day. I left the car and when I returned, it's profile was the shape of a banana. That was years ago and since then i've become a bit more vinyl compassionate. Wonder if the glass sandwich in the sunlight would work.
It might, but the sunny season isn't gonna be around much longer until next spring I'm afraid around these parts.
I lived up there for 10 years and it rained on 9 4th of Julys!The rockets would go up into the precipitous "fog"; we'd hear them explode, but you couldn't see sh*t!
To stay up there you must be either hopeful or resigned.
Best regards,
Paul S
Vinyl melts at 160 degrees from what I have been told. It will take the floor tiles about 10 degrees to reach temperature. At 175 degrees you should be able to get the vinyl to relax its memmory. Popping the door open and turning off the heat at 20 minutes completely flattened two of my albums without effecting the sound.You could try 175 degrees for 15 minutes too. I had good success with 175 degrees at 3750 ft of altitude. At sea level you might want to use less heat or fewer minutes.
Ah, so I did miss read your post then. :-(Sadly, I don't but I know now what to do I think.
Putting in the tiles and warming for say 10 minutes and then taking the tiles out.Garth said he just turns off the oven, opens the oven door, and lets it cool. I thought this made better sense.
I tried 175 degrees for 15 minutes and it was not sufficient time at my elevation which is 3750 ft.
I warm the oven up to 175 degrees or so and shut it off.At this point I place my "glass-record-glass" sandwich in the oven (The oven is off!), shut the oven door and come back in an hour.
This method works about 80% of the time bringing an unplayable record to playable condition.
I don't bother doing this with records that will play.
--
Al G
Hmm.. I think I remember that they said 150 - 175 degrees, not 250.250 seems way hot for vinyl.
Hey, maybe your thermometer is so far off that the record thought it was back in a stamper again :^)
I have read an article long time ago about flattening record between 2 clean heat resistant glass plate in an oven.I don't remember the exact temperature but it was in the 100-200 range.
In the article, they insist on the cleaniness of the record and the plates.
Pierre.
I got the info from right here on the vinyl archives and wre posted just the otehr week by Tubesforever and others of using ceramic tiles, and I thought I read he used 270, or even 250 as 150 wasn't enough.I'll admit, I just skimmed the article quickly this morning to get the temp he has used but had read it fully at the time he posted the reply later on in the thread.
With excellent results.I bit the bullet and bought 2 13" square 1/4" tempered glass.I cleaned them well,put the clean LP between,put them in the oven pre-heated to 170 deg (270 is way to high!)for 10 minutes.Much to my surprise a badly warped record came out almost dead flat and seems to play perfectly.Oh I took the glass sandwich out of the oven after the ten minutes,put it on the counter and let it cool for at least 3 hours with some phone books on top.
There's one factor in the process I'm trying to figure a way to overcome and thats the thickness of the label doesn't allow for absolute flattening.I'm gonna get some thin Teflon sheet and cut some holes for the label to act as a nice non-stick buffer.This will allow the glass to make contact with the entire record surface.
The only other thing would be to have someone machine some heat resistant material with a recess like a platter,that would be the ultimate for this job!
After a quick search on the web, i find a reference to the article i have read a long time ago (oven baking). Also there is others methods to unwrap LP on that page.
If i where you, i do tests on junk records.
Pierre.
Oops! too fast on the button.
Pierre.
Get an accurate oven thermometer and keep a note book of the results at increments of 5 degrees (and varying times). That way you will have good info if you find a combo that works. Then you can tell us! : )
Vince
The idea I got was from Tubesforever.The other issue is that the thermometer I have may be broken as even at "full preheat", the guage still read less than 200 Degrees F. :-( Of course, after the fact too.
I'll get a new guage and try again. I may have to start out at 150 and go up from there.
The idea is to "relax" the vinyl biscuit - not get it to melt flat.But you need a good "jam thermometer" so you can accurately calibrate your oven.
Regards,
This post is made possible by the generous support of people like you and our sponsors: