Originally Posted by Sadiemae
I was told that in the beginning it was done to reduce bulk and add strength to the seam. I know that my LQS now teaches people to press open, so I am not sure. I find that it is easier to press a 1/4" seam to the side, rather than to press them open.
This is what I heard also. It adds strength to the seam - My mantra while pressing seams - "Press to the dark". Edie