An all purpose zipper is the most commonly available and commonly used zipper. An all purpose zipper is a fairly lightweight zipper with small teeth. The end of the zipper has a lock which holds the zipper tape together, preventing the ends from coming apart. It is the type of zipper you will use as a closure in most garments. Dresses, skirts, slacks and blouses are the type of weight that use an all purpose zipper.
An invisible zipper is a zipper with very fine teeth. The way an invisible zipper is sewn in to a garment, makes the zipper invisible and hidden in a seam. The only part of the zipper that is left visible is the pull tab and that tends to be smaller or less obtrusive than other types of zippers. No top stitching is needed on an invisible zipper. An invisible zipper is commonly used in formal wear type of clothing.Invisible zippers are not available in as many length variations as as all purpose zippers. They are also not available in as many colors but because they are hidden in the seam, a color as close as possible is fine. Special sewing machine feet are needed to sew in an invisible zipper. These feet are available where invisible zippers are sold. These feet hold the zipper coil so that the stitching is where it needs to be to keep the zipper invisible.
Separating zippers are zippers that open at the bottom allowing both sides of the zipper to come apart as in a jacket zipper. The type of separating zipper depends on the garment you will be using the zipper. Length and teeth weight are the primary considerations. A metal zipper will weigh more than a polyester or plastic tooth zipper. For example, a light weight fleece jacket would sag with the weight of a metal zipper. A heavy weight wool jacket would welcome the strength and rigidity of a metal zipper and would not sag from the weight of a metal zipper. Separating zippers are also available in a reversible zipper.
All sleeping bags have
a long separating zipper. Sleeping Bag Zippers are available in black and are 100" long. Doll clothes require a tiny short zipper. Separating Doll clothes zippers are available in 4" and 6" lengths and five colors. When you don't need a separating zipper a lightweight all purpose zipper can be used in doll clothes by shortening the zipper.
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