Bullion or purl: what's the difference and how do you choose?

French wire or purl: what are the differences and how to choose?

Are you new to goldwork embroidery and you hear about French wire and purl without really knowing what these two terms mean? You're not alone. These two elements are part of the fundamental vocabulary of goldwork embroidery, but they refer to very different threads, with distinct embroidery techniques. This comparative guide clearly explains the difference and helps you choose the appropriate technique for your design and your embroidery skill level.

French wire and purl: two threads, two approaches

The first thing to understand is that French wire and purl do not belong to the same "family" of threads, even though both are used in goldwork embroidery. French wire is a rigid, coiled metallic thread, which is cut into small segments and laid on the fabric like beads. Its logic is one of filling and volume: each segment creates a small three-dimensional element which, accumulated with others, creates textured and raised surfaces. Purl, on the other hand, is a continuous, flexible spring-like thread, which is laid on the fabric and fixed with small, invisible couching stitches. Its logic is one of tracing and outlining: it perfectly follows a line, a curve, a spiral, and gives body to the outlines and stems of designs.

Summary in one sentence: French wire creates volume and texture. Purl traces and outlines. The two are complementary, not interchangeable.

When to use French wire?

  1. For raised fillings. When you want to fill a surface with a three-dimensional golden texture, the petals of a flower, the scales of a fish, the feathers of a bird, French wire is irreplaceable. Its small segments laid side by side create a material effect that purl cannot reproduce.
  2. For changing light effects. Faceted, textured or pearl French wire catches and reflects light from different angles depending on the orientation of the segments. By alternating diagonally placed segments with horizontally placed ones, you can create very sophisticated light effects on large surfaces.
  3. For architectural and geometric designs. Designs based on regular segments, such as diamonds, chevrons and damasks, are perfectly made with smooth French wire. The regularity of the segments provides geometric precision that is difficult to achieve with other techniques.

When to use purl?

  1. For outlines and borders. Purl is the king of outlines. Its flexibility allows it to follow the most complex curves, such as initials, arabesques, or floral designs, with a fluidity that French wire, being too rigid, cannot match. A thick purl outline immediately gives a finished and neat look to any design.
  2. For stems and guidelines. In floral designs, stems are almost always embroidered with simple purl. It creates a clean, slightly raised line that visually structures the design and serves as a guide for French wire filling.
  3. For dense fillings. Laid in tight rows, purl creates a dense filling with a very elegant braided appearance. This technique is found on military epaulets, liturgical orphreys, and certain haute couture pieces.

Can French wire and purl be combined in the same design?

Not only is it possible, but it is the classic combination in traditional goldwork embroidery. Most major goldwork pieces use both techniques in a complementary way:

  • Purl for outlines and stems
  • Smooth French wire for surface fillings
  • Textured or pearl French wire for textured areas and highlights

This combination creates a natural visual hierarchy: purl outlines structure the design, and French wire fillings give it depth.

Quick decision guide based on your project

The choice between French wire and purl depends primarily on the visual effect and the type of work you want to achieve in your embroidery design. If your goal is to fill a raised surface, French wire is particularly suitable. Whether smooth or twisted, it adds volume and catches the light well, which gives a rich and textured finish.

To create a precise outline, simple purl is generally the best choice. Its regular structure allows it to follow clean lines with delicacy. If you are looking to create a thick and prominent border, it is better to opt for a thick purl, which will immediately give presence to the design.

In the case of embroidering fine initials, simple purl works very well, but you can also use couched gold thread for an even more delicate and elegant finish. To achieve a scale or feather effect, textured French wire is ideal. Its specific texture allows for interesting interplay of light and relief. If you need to quickly fill a large surface, double purl, laid in tight rows, is an efficient and uniform solution.

Finally, for a floral design with raised petals, combining the two techniques is often the most relevant: French wire to give relief to the petals, and purl to precisely draw the stems.

Frequently asked questions about French wire and purl

Which technique should I learn first?

Start with smooth French wire: it is immediately rewarding because the relief appears from the first segments laid. Once you are comfortable with handling segments and fabric tension, move on to simple purl for outlines. The combination of the two will come naturally after two or three projects.

Can French wire be used alone without purl?

Yes, some styles of goldwork embroidery use French wire exclusively, especially traditional Turkish and Ottoman goldwork. The result is very textured and raised. However, for designs with precise outlines or fine curves, the absence of purl gives a less neat finish.

And conversely, can one embroider only with purl?

Also yes. Traditional French couched goldwork primarily uses gold thread and purl without French wire. The result is flatter but very elegant, with great precision in the outlines. This is often the recommended technique for beginners who do not yet have the manual dexterity required for French wire.


All our goldwork embroidery kits include both smooth French wire and simple purl, with two illustrated technical sheets. Ideal for practicing both in the same project and understanding their complementarity in practice.

Embroidery kits

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