They tend to be either rubber or felt though you can get glass and cork mats.
How to flatten rubber mat.
Most turntables have some form of mat.
If it doesn t do so on its own once it is good and warm you can place heavy objects on it like books and leave them there until the mat has cooled.
Keep it rolled up longer for thicker less for thinner plastic with a rubber band and check it every so often until the previously upturned curled corners are laying flat as.
This will cause to to slowly warm and the mat should then lay back flat.
The mat is the picture above relaxed in about two days.
If you don t have space.
Creating this opposing new curl shape will in effect straighten the curled plastic.
Best way to flatten a rubber mat.
Rubber can harden and discolour with time.
This can leave the mat looking rather tired and also reduces its ability to provide a firm platform for the record surface.
Rug mats for example are often made of rubber and slid underneath fabric rugs to prevent slipping and sliding.
Unroll the mat as flat as you can get it.
Rubber objects can act as a protective layer atop valuable and fragile materials and are also useful as safety devices.
This article is about the rubber type.
In this video i am fixing unwarping my self healing cutting mat that got warped and bent with the heat from my laptop.
I have acquired a few mats over the years and some haven t been stored super well and have creases in them so they dont lay flat.
You should be able to see a drastic difference in about 24 hours and the mat will typically lat flat at 72 degrees f in about 3 full days.
Best way to flatten a rubber mat.
A good way to try and fix a warped mat is to lay it out on a flat surface in the heat of the sun all day.
Any idea how to fix it.
In the winter it may be more like 7 days or longer.