Tab Lock Clasp - An easy-open clasp which closes by inserting the decorative tab into the slot of the other half of the clasp. This easy-open, easy-close style is held closed by the weight of the finished jewelry itself. Due to their ease of opening, they are recommended for necklace designs.
Tempering - A heat treatment used for metals and glass. Tempering is used to toughen steel and change the breakage effect in glass. Tempered glass is used for automobile windows, glass tables, lab equipment and more.
Thread - A length of fine string composed of several fibers twisted or spun into a single strand. Thread can be made of natural fibers (such as silk and cotton) and manmade fibers (such as nylon and Kevlar). Thread that has been woven (or braided) into a thick tube (or flat strand) becomes Cord.
Thread Heaven® - A non-toxic, hypoallergenic synthetic polymer material used to coat beading thread. It binds thread fibers and prevents fraying--straightens, strengthens and weatherizes. It adds a thin, even, slick coating to thread so beads slide easily and produces a small static charge which dramatically reduces tangling. It won't stick to beads or needles and does not attract dust or clog bead holes. It doesn't tarnish silver-lined or metallic beads.
Tigertail™ - A miniature braided stainless steel cable-style wire used for jewelry-making. Tigertail has a nylon coating, which protects the steel wire from corrosion or wear, and is stiff enough to be strung without using a beading needle. Tigertail is secured with a crimp bead, crimp tube or crimp clasp.
Titanium - items are made of neutral grey, lightweight metal. After manufacturing into the desired shape, such as earposts, the neutral grey base metal titanium can be anodized into six colors. (Note: anodized titanium earstuds are not certified hypoallergenic, however most metal-sensitive people can wear them comfortably.)
Toggle Clasp - (also called bar-and-ring clasp or T-bar clasp) A style of clasp consisting of a loop (usually a circle, but sometimes other shapes such as stars, hearts or leaves); the other piece is a ''T'' shaped bar. The clasp is closed by pulling the ''T'' shaped bar through the open loop. Immensely popular and easy to use, the toggle clasp is available in almost infinite material options and in a variety of styles, weights and designs. They are commonly used for necklaces (especially lariat style), bracelets and anklets.
Torpedo Clasp - (see also Barrel Clasp and Screw Clasp) A low-profile clasp with a threaded closure, which is twisted or screwed to open and to close. Can include Bead Clasp styles.
Troy Ounce - The weight system used for precious metals, differs from a standard avoirdupois ounce, the weight system used for food and non-precious metal items. Only precious metal uses the troy ounce system. One troy ounce = 31.1 grams. One avoirdupois ounce = 28.4 grams.
Twister Clasp - A hinged clasp which is hooked through each end of a continuous necklace, or opera-length pearl strand, changing it into a twisted choker necklace.
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