If a record is improperly stored and or kept in a high temperature environment the vinyl may warp and the record may become unplayable.
Temperature vinyl records warp.
Put your vinyl glass sandwich in the oven for 30 minutes.
Place the record between the two panes of glass making sure the record is clean first.
Improper storage exposure to heat and cats can lead to warped vinyl.
From good old wikipedia store in use lps at a temperature of 65 to 70 f 18 to 21 c.
Pressure against the record and at room temperature below 75 degrees f.
The linear expansion coefficient of rigid pvc is small and has good flame retardancy the limiting oxygen index loi being up to 45 or more.
Other factors such as humidity sunlight exposure and improper storage can drastically impact the resilience of a record.
Though relative humidity rh is considered less an issue for vinyl than other recorded media 13 it is recommended that lps be stored at 45 to 50 rh.
This will make it easier to retrieve later.
A typical vinyl record can start warping due to heat at a temperature of 140 f 60 c and can melt at temperatures exceeding 212 f 100 c.
Depending on your oven preheating should take between 10 15 minutes.
Don t push the glass too far into the oven.
Determine whether or not that fixed the warping.
Turn the heat off.
Warped vinyl can lead to a wobbly sounding rendition of your favorite song.
Those in long term storage should be kept at 45 to 50 f 7 to 10 c.
Once the oven has reached the right temperature carefully slide the record and glass combination onto the oven rack.
Preheat the oven to its lowest temperature setting.
Direct sunlight increases in temperature and or uneven storage pressure are the principal components that can lead to warping vinyl records.
You ll need two sheets of glass larger than your album but small enough to fit in your oven.
Let the record cool down to room temperature.