French & Flat Felled Seams on a Motorcycle Seat - Automotive Leather Upholstery

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The most common decorative stitches in automotive upholstery are 'french seams and flat felled seams'. They are kinda fascination to all of us the car trimmers. That is why I am now reviving these seams on a motorcycle seat. Furthermore, as an extra touch I am adding the well known trim that is the piping/welting in an artisan mode.
What is important to stand out is how useful is the molding process (techniques taught in our basic courses) to achieve covers with tailor's precision.
Besides, the use of extra items that really help us with the sewing to get more straight line of stitches to getting a more professional outcome.
I know many of us can sew precisely by 'eyeball' but we should not discard the use of OEM attachments that were invented for this purpose and are used in the upholstery section of most prestigious car factories.
As we can see, for this demonstration I am using a 1.3 mm thick, sturdy beige automotive leather not easy to handle if not for our molds.
I have used a thin 92 size polyester thread for the blind closing sewings with 3 mm stitches.
A 138 size polyester thread for the decorative stitches on top with 6 mm stitches.
I also have used blind sewings (inside hidden stitches) for the row of pleats/channels on main top panel. The foam for these pleats is 1/4" of an inch thick medium density foam. The backing cloth is felt fabric.
The other surrounding panels are foamed with a soft headliner 4mm thick foam.
I hope you find some inspiration in this video to perform your own upholstery projects!

Видео French & Flat Felled Seams on a Motorcycle Seat - Automotive Leather Upholstery канала Cechaflo