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.
Drafting mat won t flatten out.
Dude take it out of the box remove the plastic wrap around it let the mat sit in corner for a day or two to adjust to the climate of your room.
Now the hard part.
They wrote that once a mat has been warped it can t be flattened.
Every time i attempt to unroll it it keeps curling back up.
Unrolling the rug.
Take a push broom and sweep it.
A new area rug or one that s been rolled up and tucked out of the way for a while gets used to its rolled shape over time.
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.
Here s the problem i ve got a floor plan that has many objects at different z values throughout the drawing much to my chagrin after working for countless hours on the plan.
So now my snaps don t work i turn the drawing and hello to multiple planes.
If a reroll doesn t work or it s too cumbersome to roll backwards roll out the mat and flip it over so the curled edges are facing up.
This will normally flatten the rug in about a week but only works if the rug is smaller than your mattress.
Place your mat on a smooth flat surface outside in the sun on a warm sunny day until it flattens check it every 15 minutes.
I bought one of those clear hard plastic office chair mats from staples months ago and have tried repeated times to unroll it.
Put the rug between the mattresses on your bed on top of the box spring.
This will cause to to slowly warm and the mat should then lay back flat.
Another site suggested putting it on flat sheet and placing in an oven at 200 degrees fahrenheit.
There very stiff when you get them as there.
How to flatten an area rug that has been rolled up.
Now your mat is ready for installation.
After it relaxes and is flat move it to a flat cooler area in the shade or indoors until it cools and becomes more rigid.
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I can t get it to lay flat long enough to put it up my chair.
Walk away and leave it.
Push hard and push out as much of the air as you can.
But frisk another manufacturer of cutting mats say to leave the mat in direct sunlight or warm water for a period of time and it will resume its original shape.
It s a really thick hard plastic with those sharp pointy things underneath that sticks into the carpet.
Weight down the edges with objects such as heavy books.
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.