When dealing with small strips cut on the bias it is really easy to distort them.
I think that has happened with the strip shown as an example, as the lower edge yellow stripe intersection looks as though it is stretched, though it could be that the strip was folded on a curve as at the left side the yellow V seems too narrow.
For similar sewing I would not cut out the piece exactly but make it oversize, tack it into place and trim it down with infinite patience in order to get the match exact - otherwise it would just bother me every time I saw it. I know I make even the most particular people raise an eyebrow, but getting something almost right just does not work for me.
I once disassembled a completed jersey and re-knitted the back because there were three stitches wrong. I just had to do it.
There is something called stay stitching which might help - it is just a line of machine stitching which stops an edge from distorting once it is cut and handled. If you do it on the uncut cloth it can help a lot with small pieces. Also having a board covered in a thin foam and a cloth with something like gingham fixed to it - as long as the angles are right you can then pin out cloth on the square and be fairly confident of working true and level.
Anne the Pleater :ootd:
Bookmarks