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This video mainly shows how useful the special piping foot is to make double stitches with a piping trim in the center. This new prototype makes double stitching of 9/16" of an inch, Slightly wider than the previous one I showed in a former video.
This time the demonstration is that this foot is not only useful for straight edges but curved edges too.
As we can see this is only a sample or test done on one side bolster of a car foam base.
Besides, I have not forgotten to share with you my interested users several upholstery tips.
The first is the use of molds to ease the marking, cutting, and sewing process. These procedures are taught in our courses and involve and are applied for different shapes of car seats.
The second tip is how a foamed panel is prepared by doing a double sewing on the panel edges. As shown before in previous videos, as our panels are foamed, it is necessary to flatten their edges. This process makes sewing easier.
A third tip also shown in a previous video is how to reduce the bulky part of a sewing junction considering this would be the flap that is turned over to oversewing on top.
A fourth tip I am sharing with you is how the piping/welting strip is made by using a regular upholstery glue.
In a previous youtube video I have shown how to attach a piping strip directly to vinyl edges at one go. This method is used this time.
For the piping attaching at one go I have used a homemade piping foot. I made it out of a double leg standard foot. It works out the same as the other OEM piping foot.
Let's not forget to consider the stretch side of vinyl material (the same with leather) to cut the required panels. It helps to ease the sewing and fitting process.
Another important tip it is included in the video is how to approach convex portions. As these panels are foamed (4 mm thick foam material) my advice is glue the edges down in place. As you can see in the video the thin foam is first shaped then the vinyl piece is shaped and glued down over. It is much better to spray glue over this whole panel. This technique works out for different convex areas to avoid folds or creases.
I hope you find useful information in this video. Besides, inspiration to perform your own upholstery projects!

Cesar