Variable Dent Reeds: A Beginner's Guide
A variable dent reed is a rigid heddle that can change dent size along its width. Instead of one fixed spacing across the whole reed, a frame holds removable sections of different dent sizes, and you arrange those sections in any order you choose. The result is a single reed that can run a fine spacing on one part of the warp, an open spacing on another, and any combination in between, all at the same time.
If you've ever wanted to weave a bulky border with a fine body, mix textured handspun next to smooth commercial yarn, or get density variation across a single piece of cloth, a variable dent reed is the tool built for that. This guide explains what variable dent reeds are, how they work, and how weavers actually use them.
What A Variable Dent Reed Actually Is
A standard rigid heddle reed has one dent size. An 8-dent reed has 8 slots and holes per inch all the way across. A 12-dent reed has 12 per inch, end to end. Whatever the dpi, it's the same across the full weaving width, and you choose your reed based on the yarn you're working with.
A variable dent reed replaces that single fixed reed with a frame that holds short, swappable sections. Each section has its own dpi, and the sections drop into the frame in whatever order you arrange them. Most kits include sections in several different dpi values, typically ranging from very open (around 2.5 or 5 dpi for chunky yarn) up to fairly fine (12 or 15 dpi for sock and lace yarns). Within a single warp you might run a 5 dpi section on one edge, a 10 dpi section in the middle, and another 5 dpi section on the far edge, or any other combination that fits your project.
The sections themselves come in two physical lengths, usually a short section and a long section, depending on the brand. Schacht's sections are about 2-3/8 Inches wide. Ashford's are 5cm and 10cm (about 2 Inches and 4 Inches). Kromski takes a different approach with their Weaver's Choice system, where each piece is an individual heddle assembled one at a time. The mechanical detail varies, but the underlying idea is the same: build the reed for each project.
Once the sections are in place, the frame closes with a top rail and the reed works exactly like any other rigid heddle. You warp the loom, thread the slots and holes, and weave. There is no special technique involved beyond choosing what goes where.
The Problem A Variable Dent Reed Solves
Different yarns want different setts. A bulky handspun needs an open dent to pass through cleanly. A fine sock yarn needs a tight dent to weave a fabric with body. The moment you want to use both yarns in the same piece, a fixed-dent reed forces you to compromise: either too tight for the bulky yarn or too loose for the fine yarn.
That's the first problem variable dent reeds exist to solve. The second is more subtle. Even with a single yarn, you sometimes want intentional density variation across the cloth. Open zones for lace effects, denser zones for structural areas, alternating bands for visual rhythm. A fixed reed can do some of this through threading tricks, but a variable dent reed lets the reed itself enforce the change with no fancy threading required.
The third problem is practical. Instead of buying a separate reed for every dent size you might need, a variable dent reed gives you the full range in one frame. You build the reed for the project at hand, then rebuild it for the next one.
A Quick Word On Sett
Sett is the spacing of warp threads in your weaving, measured as ends per inch (epi). It's determined by which dent size you use and how you thread the reed. The right sett for a given yarn depends on the yarn's thickness, its springiness, and the kind of fabric you want.
The simplest rule of thumb is the wraps-per-inch test. Wrap your yarn snugly (but not crammed) around a ruler for one inch and count the wraps. For balanced plain weave, your sett is roughly half that number. So a yarn that wraps 20 times per inch wants a sett around 10 epi, which corresponds to a 10-dent reed.
If your sett is too tight, the cloth comes off the loom stiff and board-like. If your sett is too open, the weft packs in too far and covers the warp, giving you a firm, weft-faced cloth that won't drape. The right sett produces a balanced cloth where warp and weft are equally visible and the fabric has the hand you wanted. Sampling helps, which is one of the things a variable dent reed makes a lot easier.
Matching Dent Sizes To Yarn
Most variable dent kits include sections that cover the working range of yarn weights a rigid heddle weaver typically uses. Here's a rough guide to what dent size pairs with what yarn for balanced plain weave:
| Dent Size | Yarn It Suits | Approximate WPI |
|---|---|---|
| 2.5 dpi | Super bulky, chunky handspun, novelty and art yarns | 5 to 6 WPI |
| 5 dpi | Bulky weight, thick handspun, aran | 9 to 11 WPI |
| 7.5 dpi | Worsted, thick textured yarns, brushed mohair | 12 to 14 WPI |
| 8 dpi | Worsted weight (the common starter sett) | 14 to 16 WPI |
| 10 dpi | DK, light worsted, sport | 16 to 20 WPI |
| 12 to 12.5 dpi | Fingering, sock yarn, 4-ply | 22 to 26 WPI |
| 15 dpi | Lace, light fingering, fine weaving cottons | 30+ WPI |
These are starting points, not rules. Different fibers behave differently at the same WPI: a slippery silk and a sticky wool of identical thickness can want different setts, and your finished use matters too. A drapey scarf and a sturdy bag have different needs from the same yarn. When in doubt, weave a sample first.
The range of dent sizes a kit includes determines what yarns it can handle well. A kit with four dent sizes (typical of some smaller systems) covers most knitting yarns from bulky through fingering. A kit with six dent sizes (the wider end of the range, available in sizes up to 48 Inches for the largest looms) extends from chunky handspun and roving all the way down to fine cotton suitable for traditional weaving cloth.
The Three Things Weavers Actually Do With Them
Three uses come up over and over in variable dent reed projects.
Mixing yarns of different weights in a single piece. The most common reason to reach for a variable dent reed. A scarf with a chunky border and a fine merino body. A blanket with thick textured stripes between fine wool sections. A bag with bulky panels and finer detail areas. With a fixed reed you'd have to compromise on one sett that doesn't really suit any of the yarns. With a variable dent reed you build the right dent into each zone of the warp, and every yarn weaves at the sett that suits it.
Crammed and spaced effects with a single yarn. Using one yarn at varying setts across the warp produces visual density variation that looks far more complex than the technique itself. A fine wool warped at 12 dpi in some sections and 5 dpi in others gives bands of dense and open cloth, which after washing settles into gentle ripples and pulls. The Schacht resources blog has a lovely example by Jane Patrick of a marigold-and-white scarf woven this way that puckers into a seersucker-style fabric after fulling. The same principle works for shawls, scarves, curtain panels, and any piece where textural rhythm is part of the design.
Sampling multiple setts on a single warp. If you're not sure how a particular yarn will weave at 10, 12, or 15 dpi, a variable dent reed lets you set up a short warp with all three setts side by side and weave samples of each in one session. Cut the cloth off the loom, wash and dry it, then compare. Far faster than warping three separate samples, and the comparison is fairer because every sample saw the same warping tension and the same beat. Gist Yarn has a nice writeup of using this approach to test three of their yarns at three setts each, producing nine samples on a single piece of cloth.
Beyond the big three, weavers also use variable dent reeds to integrate art yarn or handspun in dedicated wide-dent zones surrounded by smoother yarn, to leave deliberate gaps between sections for textured warp ends, and to weave stashbusters that combine leftover yarns of different weights in a single piece. Once you start seeing the cloth as zones rather than a uniform field, the design possibilities open up considerably.
How To Actually Use One
The real work happens before any yarn touches the loom. Sketch out your warp on paper, segment by segment, deciding which dent sizes go where across the full weaving width. Each section is a fixed physical width (depending on the brand, somewhere around 2 to 4 Inches), so the sketch is more a layout than an open-ended design. Total the segment widths and confirm they add up to the weaving width you want. If you have gaps between sections you intend to leave unthreaded, plan for those too.
Once the layout is set, assemble the reed. Most weavers find this easiest to do at the loom, with the bottom rail in the heddle position and the top rail off. Slide the sections in, in the planned order, then place the top rail and tighten the frame. The frame screws should be snug; if they aren't, sections can shift mid-project, which is a frustrating problem to discover halfway through warping. With Schacht's system specifically, each section has a smooth edge and a cut edge, and they need to seat with smooth meeting cut. Other systems have their own equivalent details worth checking against your kit's documentation.
From there, warping is identical to any other rigid heddle setup. Direct method or indirect method, whichever you prefer, no special technique required. The only decision unique to variable dent reeds is what to do with the slots between adjacent sections. By default, treat them as normal slots and warp through them. If you specifically want a small open vertical line in your cloth at that point, leave the slot empty.
One thing worth knowing if you're mixing yarns of very different weights in a single warp: the thicker zones of cloth will build up on the cloth beam faster than the thinner zones, and the fell line can drift as you weave. Forgiving yarns like wool tend to settle this out during washing. Less forgiving yarns like linen will hold the distortion, so plan your project accordingly. For a first variable dent reed project, wool of varying weights is friendlier than linen of varying weights.
Common Beginner Questions
Q: Will a variable dent reed fit my loom?
A: Match the brand and the weaving width. Variable dent reeds are designed for specific loom systems, so an Ashford reed fits Ashford rigid heddle and Knitters looms, a Schacht reed fits Cricket and Flip looms, and a Kromski Weaver's Choice fits Harp, Harp Forte, and Presto looms. The reed sizes are specified by weaving width (the same way fixed reeds are sized) so check both the brand and the width before buying.
Q: Do I need a special warping technique?
A: No. Direct or indirect warping both work, exactly as you'd warp a fixed reed. The only difference is that the dent size changes across the width, so as you thread you'll need to track which section you're in and which yarn goes where. Other than that, the process is the same.
Q: Why is the assembled reed slightly narrower than a fixed reed of the same size?
A: The frame hardware takes up some width. The amount varies by brand but is usually around a quarter inch. For most projects this is irrelevant; it only matters if you're trying to weave at the absolute maximum width of your loom and need to account for every fraction of an inch.
Q: Can I weave a whole project at one uniform dent size on a variable dent reed?
A: Technically yes, by filling the frame with sections of the same dpi, but it's usually not the best use of the tool. Most kits don't include enough sections of any single size to fill a full-width frame, and when they do, a regular fixed reed is simpler and just as effective. The variable dent reed earns its keep when you're mixing dent sizes within a project.
Q: Can I buy extra sections?
A: Yes. Both Ashford and Schacht sell individual replacement sections, which is useful if a section gets damaged or if you want extras of a particular dpi to extend your kit's flexibility. Kromski sells extra heddle packs for the Weaver's Choice system the same way.
Q: Is a variable dent reed harder to use than a regular reed?
A: Not really, once it's assembled. The planning step is a little more involved (you're designing the reed itself, not just choosing one), but the actual weaving is identical. If you've warped a fixed-dent reed comfortably, you have all the skills you need to use a variable dent reed.
Should You Get One
Variable dent reeds aren't necessary. Plenty of weavers do excellent work with a small library of fixed-dent reeds and never miss having a variable one. What a variable dent reed gives you is flexibility, and whether that flexibility matches your weaving practice is the real question.
The weavers who get the most out of them are handspinners working with yarns of varying grist, experimental weavers who like crammed-and-spaced and mixed-yarn projects, weavers who do a lot of sampling, and anyone trying to use up odds and ends from a yarn stash. If those describe you, a variable dent reed will see regular use.
The weavers who probably don't need one are those focused on uniform production work like tea towels, table runners, or yardage at consistent sett, and beginners who haven't yet warped a fixed-dent reed comfortably. If you're new to rigid heddle weaving, get a fixed reed in the dent size that matches your usual yarn first. A variable dent reed is a much better second or third reed than a first one.
If you're somewhere in between (curious, willing to experiment, working with a mix of yarns from your stash) a variable dent reed opens up territory that a fixed reed simply can't reach. They're not essential equipment, but for the right weaver they're genuinely fun, and they make projects possible that would otherwise mean weaving each section separately and seaming them together.
If you're ready to look at what's available, take a look through our variable dent reed kit options to see what fits your loom and weaving range. Or, feel free to give us a call! Our number is 509-536-7746 if you ever need help or want help choosing your reeds!