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Exploring Clasped Warp on a Rigid Heddle Loom
The Clasped Warp technique is a dynamic way to add color play and vertical patterning to Plain Weave on a rigid heddle loom. By interlinking warp yarns at selected points, you create a warp in which one yarn dominates on one end of the loom and the other on the opposite end. The location of each clasp—whether centered, offset, or varied across the width—sets the visual rhythm of the cloth and opens the door to bold graphic effects and unique design possibilities.
Common Uses
Because Clasped Warp adds vertical patterning to a warp, this technique is more effective when used in longer pieces where the color shifts can unfold across the full length of the cloth. Scarves, shawls, and table runners are classic applications. The technique also lends itself well to coordinated sets, such as towels or pillow covers, where adjusting the clasp placement or color sequence allows each item to relate visually without being identical. Even though Clasped Warp is most often paired with Plain Weave, which showcases the clean graphic quality of the clasps, it is not limited to a simple structure. Pickup-stick patterns can introduce additional texture or motifs that interact with the vertical color changes, and warp-dominant structures like Rep Weave can produce bold, rhythmic effects.
Designs
Once you’ve chosen a project type, the fun begins—experimenting with design. Simple pencil sketches help you explore clasp placements, color interactions, and even how Clasped Weft can enhance your ideas. Below are several designs to spark your imagination.
Example 1: Random Junctures
Randomly spaced clasp points along the warp create a gradual vertical color gradient from one end of the piece to the other.
Example 2: Large Isosceles Triangle
This design creates a large isosceles triangle by placing clasp points along two diagonal lines that rise from the lower edges of the warp and meet at the center.
Example 3: Center Value Shift
In this design, clasp points occur only in the middle third of the warp. By alternating clasp placements within this center section—either in consistent positions or at random—you create a light area at one end, a dark area at the other, and a value-shifting band in the center.
Example 4: Right Triangles
This design uses multiple warp colors arranged in vertical sections, with diagonal clasp lines crossing the center of each section. Using an even number of yarns—six in this example—divide the warp into half as many sections and place a diagonal clasp within each one to create a sweeping, multicolor effect.
Example 5: Stair Steps
This design creates a stepped diagonal by moving the clasp point across the warp in small increments. Divide the warp into as many steps as you like, and repeat the clasp in the same position for each step before shifting to the next.
Example 6: Diagonal
This design combines a Clasped Warp with a matching Clasped Weft to form two solid right triangles. Place the warp clasps along a diagonal line, and mirror that same diagonal when clasping the weft. Use Yarn A for both warp and weft on one side of the diagonal and Yarn B for the other.
Example 7: Center Image + Clasped Warp
This design combines a Clasped Warp with a Clasped Weft to create a centered curved motif framed by solid-color sides. A curved line of warp clasps sets the outline, and matching weft clasps in the same location build the interior shape. Alternating the weft yarns through the center area produces a value that blends Yarns A and Yarn B.
Supplies
Once you’ve sketched out a Clasped Warp design you’re excited about, it’s time to gather the tools and yarns you’ll need to weave it. Creating your project on a rigid heddle loom doesn’t require any specialty tools, but choosing the right equipment for your yarn and design will make warping easier and produce a more predictable cloth. In addition to a rigid heddle loom wide enough for your project, you will need a reed, a few tools and yarn.
Reed Selection
In Clasped Warp, two strands of yarn share each slot and hole as a paired unit. Because of this, choose a reed that matches roughly twice the normal sett of the yarn you plan to use. For example:
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5-dent reed: Suitable for yarns that typically weave at ~10 epi, such as Ode Alpaca, Beam 3/2 Organic Cotton, or Mallo Cotton Slub.
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7.5–8-dent reed: Works well for yarns that weave at 15–16 epi, including fingering-weight yarns, Sero Silk Noil, and Duet Cotton/Linen. It also produces a slightly firmer cloth with Mallo Cotton Slub or Beam 3/2 Organic Cotton compared with a 5-dent reed.
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10-dent reed: Used for yarns normally woven at 20 epi, such as Beam 8/2 Organic Cotton.
Tip: A reed that is slightly more open than the doubled sett of your yarn can also work well if you want more drape or a more loosely woven piece.
Tools
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Warping peg
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Scissors
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Threading hook
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Painter’s tape
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Warp separator
Yarn
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At least two yarns: One ties onto the back apron rod and one ties onto the warping peg. These yarns will clasp together in the center of the warp.
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Optional additional yarns: You can introduce even more color or texture by changing yarns as you warp across the reed. You can change the yarn on the back apron rod or at the warping peg or both.
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Color and contrast: High-contrast pairs create the most dramatic clasped-warp effects. Pairing a solid yarn with a variegated yarn can make the variegated colors appear more vibrant.
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You may also want to experiment with:
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pairing smooth yarns with textured ones
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value sequencing for gradient effects.
Warping the Loom
Now that you’ve got everything you need, it’s time to warp the loom. The steps are simple, and you’ll quickly find a rhythm as you build your Clasped Warp.
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Place Yarn A on the floor behind the loom and tie the loose end to the back apron rod.
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Place Yarn B on a table in front of the loom and tie its loose end to the warping peg.
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Mark your clasp locations on the table using painter’s tape. If the table doesn’t reach the loom, you can extend it with a piece of cardboard and mark clasp points on it, or you can mark the clasp points on the floor with painter’s tape.
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Keep clasp points at least 18" away from both the back apron rod and the warping peg. This prevents clasps from falling into loom waste, fringe, or unstable tension zones.
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Begin the first clasp: Sley two ends of Yarn A through the first slot.
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Carry the loop of Yarn A to the location of the first clasp.
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Pass the cone or ball of Yarn B through the loop of Yarn A to form the clasp.
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Return Yarn B to the warping peg and wrap it around the peg.
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Stabilize the tension. To keep the clasp from shifting, lightly tape Yarn A to the back beam after you sley each strand. This holds the clasp in place as you move on to warp the next pair of strands.
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Form the second clasp: Sley two ends of Yarn A through the first hole. Repeat steps 6–9.
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Continue working across the reed sleying two ends of Yarn A in each hole and slot and creating clasps with Yarn B according to your design plan until the entire width is warped.
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Before removing the yarn from the warping peg, tape the warp to the back apron rod. This acts as a temporary choke tie and prevents shifting while winding on.
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Wind the warp onto the back beam with a warp separator as you normally would.
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Because each pair of yarns is already threaded through its slot or hole, there’s no need to shift yarn from slots to holes after winding on.
Note: Not every pair of warp ends needs a clasp. You can allow some ends of Yarn A to run straight from the loom to the peg without linking, which gives you additional design flexibility and can create pleasing intervals between clasped sections.
Clasped Warp is a simple technique with extraordinary range, whether you prefer subtle shifts or bold graphic statements. Once you begin experimenting with clasp placement, color interaction, and even combining Clasped Warp with Clasped Weft, the possibilities expand quickly. Because the method works on any rigid heddle loom and requires no special equipment, it’s an accessible way to bring fresh visual energy to familiar projects. To start your clasped warp adventure, try one of the designs here, or sketch your own variations—you may find that Clasped Warp becomes a favorite tool for adding depth, movement, and personality to your weaving.
Photos, drawings, and videos all courtesy of Carolyn Heacock.
About Carolyn Heacock
When Carolyn Heacock was in elementary school, she wove a small basket in art class. That project planted the weaving seed in her, which wasn’t watered until January 2020, when she took her first weaving class. She’s never looked back. Since then, she has acquired a rigid heddle loom, two-floor looms, and small tapestry looms made by her husband. She loves to weave utilitarian items, including hand towels, placemats, table runners, rugs, scarves, bookmarks, and coasters. In addition to weaving, she enjoys quilting, hiking, bike riding, and spending time with her family. You can find her on IG @heacockfiberworks.