Were going to add anothe inside stroke but this time contracted by only 2 px.
Go to Select > Load selecttion > Default to select the entire piece.
Create a new layer.
While the entire piece is selected go to Select > Modify > Contract > 2 px.
Now add a 1 #5E2601 stroke by going to Edit > Stroke > Location: Inside.
Set the blending mode to Color Burn and opacity level to 16%.
Step six:
The little folding effect found on the top left and bottom right can be achieve by stroking a #000000 line.
To add a line were going to use Pen tool, first create a new layer and set your brush tool to a soft edge 3 px brush. We need to set the brush settings before we stroke because PS will not let you set it in that option..
Draw your line from the top to the left side.
Right click on your mouse to access the Pen tool sub menu. Choose Stroke path.
Add a pattern overlay layer-style.
Set the blending mode to Color Burn and opacity level of 29%.
