Greetings -- I'm a long time lurker, first time poster, new leatherworker...
Had a frustrating thing happen today: my hand-stitches seem to have caused the leather I was sewing to rip along the stitch-line. I used an Osborn 700 stitching iron (I believe that iron has 1/16" prongs and 3/32" spacing) and plain-old waxed thread. Leather was 4 thicknesses of 3-4 oz veg-tan (trying to make a holster and used a flesh-to-flesh lamination for the front and one for the back). I punched my holes all the way through and saddle stitched...
It really seems like the holes made "ticket" style perforations that simply tore across the joint. After my forensics on the joint, I found that some of my practice stitches in single layers of leather are exhibiting the same symptoms. How do I keep this from happening every time i try to sew a piece together?
Aarrgghh, Andy