lawsonmugs

OK I tried the clear mono thread and this is a picture of what happened. I used red reg. thread in the bobbin. I used a button hole stitch. It looks like I sewed the patch on the pink fabric with red. I also sewed a straight stitch. same threads as the patch. I marked a black arrow to the straight stitching. I see very little dots of red. Am I doing something wrong. Are there some special settings or something?