Jaceron purl is a metal thread made from tightly coiled wires. It looks like a strand of gold pearls. It is very similar to pearl purl, but stretchier. In fact, it is sometimes classed as pearl purl.

Pearl purl is a metal thread made from tightly coiled wires, which looks like a strand of gold pearls. It is normal to stretch the purl slightly in order to make it easier to couch it down onto the ground material. This type of metal thread is often used to outline designs or, in combination with other couched threads, as a filling thread for designs, such as leaves. 

Purl is a metal thread made from a very fine wire wound around a single core, which is either tubular or triangular in shape. It is very similar to bullion thread, but tends to be firmer. 

Bullion is a metal thread made from very fine wires wound into a tubular shape. It is very similar to purl metal thread. The main forms of bullion are: a) Bright check bullion, which has a faceted (zig-zag) and very shiny surface; b) Wire bullion, which has a smooth surface and is matt in appearance; c) Bright bullion, which is a form of bullion that has a smooth surface and is shiny in appearance.

Plate is a form of metal thread made from a narrow, flat strip of metal. There are three main types of metal plate: a) narrow plate, being a flat strip of shiny metal, approximately 2 mm in width; b) broad plate, which is a broad flat strip of shiny metal 3-4 mm in width; c) whipped plate, which is a broad, flat, shiny metal plate with a wire wrapped around the plate at an angle. The three forms, when applied, are couched down in the same way.

Milliary wire is a form of metal thread made from a central metal core with another metal thread wound around it. Milliary wire is normally couched down onto the ground material with a thread of the same colour, so that the stitches are not visible. Milliary wire is generally used as an outlining thread. 

Rococo is a form of metal thread made from a fine wire tightly wrapped around a cotton core. The cord has a wavy (kinked) serpentine appearance. Rococo is comparable to crinkle cordonnet, but it is not as easy to bend, and the waves in the thread are far more even.

Flat worm (also called oval thread) is a form of metal thread made from a flattened metal strip that is loosely wound around a core yarn. This gives it a spongy feel. The thread is then lightly flattened so that the finished appearance is similar to broad plate, but is more flexible and therefore easier to handle while stitching. The thread is normally couched down with a thread with the same or contrasting colour.

Crinkle cordonnet is a form of metal thread made from a fine wire tightly wrapped around a cotton core. The cord has a wavy (kinked) serpentine appearance. Crinkle cordonnet is normally couched down with a sewing thread with the same or a contrasting colour.

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