Small-Batch Custom Processing: What to Ask For When You Commission a Mill

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Small-Batch Custom Processing: What to Ask For When You Commission a Mill

The conversation with a fiber mill usually starts with a simple question: can you process my fiber? The answer is almost always yes. But “processing” covers a wide range of services, and the difference between a batch that comes back exactly what you envisioned and one that disappoints is almost entirely in the questions you ask before you hand over your fleece.

This guide is for hand spinners and small yarn producers commissioning custom work. It covers the specific questions you should be asking, what the mill’s answers actually mean, and where things go wrong most frequently in small-batch custom processing.

The First Question: What Do You Actually Want?

Before contacting a mill, be honest about what you want the finished product to look and feel like. Mills are accustomed to clients who arrive with vague requests (“I want something soft I can knit with”), and those clients tend to get inconsistent results.

Narrow it down before you call:

  • What fiber type? (Sheep wool, alpaca, llama, mohair, blends)
  • What preparation? (Roving, batts, yarn, locks)
  • What weight and texture? (Laceweight, fingering, DK weight, worsted; woolen or worsted spun)
  • What volume? (5 lbs, 20 lbs, 100 lbs)
  • Any special requirements? (Natural dye only, custom blend, no chemicals)

Having these answers ready makes the mill conversation much more productive.

What to Ask Every Mill Before You Commit

1. What is your minimum order quantity for my fiber type and desired output?

Minimum order quantities (MOQ) are the most common reason small-batch commissions do not happen. Some mills have hard MOQs of 20 or 30 pounds of raw fiber. Others accept 5 pounds for roving or combed top. This varies significantly by mill, by service type, and sometimes by the fiber type you are sending.

Always ask about MOQ before describing your project. If you are sending 8 pounds of raw fleece and the mill has a 20-pound minimum for custom yarn, the conversation is over before it starts.

2. What is your typical turnaround time, and do you have flexibility on schedule?

Turnaround times at US custom fiber mills commonly run 3 to 9 months from receipt of fiber to delivery of finished product. Some mills are booked 6-12 months out. Others with more capacity can turn around small batches in 8-12 weeks.

Ask specifically: “If I send fiber today, when would I receive finished yarn?” Then ask: “Is there any flexibility if I need it faster?” Some mills can accommodate rush orders for an additional fee. Others cannot.

This matters because a mill that takes 8 months might not be the right fit if you need product for a fall fiber festival.

3. Do you work with breed-specific or unusual fibers, and do you have experience with my fiber type?

Not all mills handle every fiber type equally well. Some mills specialize in fine wools (Merino, Cormo, BFL) and do not have equipment optimized for coarser fibers. Some have limited experience with alpaca or mohair. A few have specific expertise in unusual breeds (Icelandic, Shetland, Navajo Churro).

Ask for their experience with your specific fiber, not just whether they “accept wool.” A mill that has processed 10,000 pounds of Merino in the last year and one batch of alpaca will give you a very different result than a mill that actively works with multiple fiber types.

4. What washing and cleaning process do you use?

Washing practices vary between mills and can significantly affect your finished product. Key questions:

  • Do you wash in hot water or cold? Hot water removes more grease but increases felting risk on fine fibers.
  • Do you use detergents or just water? Some mills use industrial degreasers. If you need chemical-free processing, ask specifically.
  • What is yourscouring yield estimate for my fiber? (They should be able to give you a rough percentage.)

If you are particular about keeping your fiber as chemical-free as possible, or if you are sending high-grease fleece (Merino, raw alpaca), this question surfaces important information.

5. How do you handle vegetable matter and second cuts?

Vegetable matter (VM) is the plant material that ends up in fleece: grass seeds, hay chaff, burrs, straw. VM is a fact of life in farm-raised fiber, but how a mill handles it varies.

Ask specifically: “Do you do any VM removal before or during processing?” Some mills run fleeces through a picker or will washer to remove loose VM. Others process as-is and rely on carding to remove what they can. If your fleece has significant VM (visible hay or grass), ask whether the mill will do additional cleaning passes and whether there is an extra charge.

Second cuts (short fiber snips from the shearer going over the sheep a second time) also cause problems. These create short fibers that do not spin well and increase nepping (tiny fiber tangles) in the finished yarn. If your fleece has second cuts, mention it upfront.

6. What preparation do you recommend for my end use, and why?

This is the question that separates good mills from great mills. A good mill takes your order and processes to specification. A great mill asks what you are making and recommends the preparation that will give you the best result.

For example: if you want a soft, drapey shawl yarn from Merino, a mill that understands woolen vs. worsted spinning will recommend woolen-spun. If you want a smooth, durable sock yarn, they may recommend a tighter twist worsted-spun yarn with a nylon blend. This kind of advice requires the mill to understand both their equipment and your intended use.

Do not be afraid to push back if a mill’s recommendation does not match your expectations. “Why do you recommend this preparation for my intended use?” is a fair question.

7. Do you offer custom blending, and how do you charge for it?

If you want a custom fiber blend (80% Merino / 20% Silk, or a custom mohair/wool blend), ask specifically about blending capabilities. Not all mills blend custom orders. Some have minimum quantities for blending, others charge per ingredient, and some only offer pre-set blends.

Ask: “Do you have minimum quantities for custom blending?” and “How is blending charged?” Blending is often priced per pound of finished blended fiber, and minimums for blending runs can be higher than standard processing minimums.

8. What are your dyeing capabilities and limitations?

If you want dyed fiber or yarn, ask specifically about:

  • Do you offer in-house dyeing or do you send out?
  • What dye lines do you work with? (Acid dyes, natural dyes, low-impact dyes?)
  • Is there a minimum quantity for custom dyeing?
  • Do you dye fiber in the raw state, combed top, or finished yarn?
  • How do you handle color matching between batches?

Color consistency between batches is one of the hardest things for mills to guarantee. If you are ordering a yarn line that needs to match across multiple dye lots, ask how the mill handles this. Some maintain strict dye lot records; others blend large dye baths and cannot replicate exact colors across runs.

9. What does your quality control process look like?

Ask how the mill checks finished product. Do they spin a sample skein before full production? Do they inspect every pound of roving or yarn? What happens if there is a quality issue?

This is also the time to ask: “What do you do if something goes wrong with my batch?” A mill with a genuine quality process will have an answer. Mills that do not have a quality control protocol are more likely to produce inconsistent results.

10. What are the exact costs, and what is included versus extra?

Before committing, get a full cost breakdown in writing. Standard items that are often charged separately:

  • Washing / scouring
  • Carding or combing (depending on preparation)
  • Spinning
  • Plying (if you want plied yarn)
  • Finishing / setting twist
  • Custom blending
  • Dyeing
  • Storage fees for fiber held over agreed timeline
  • Shipping of finished product

Do not assume anything is included. Ask specifically: “Is washing included in the per-pound rate, or is that separate?”

Common Points of Failure in Custom Processing

Understanding where things go wrong helps you ask better questions upfront.

Yield surprises: Clients expect more finished product than they receive. Always ask for a clean weight estimate. If you are paying per pound of finished yarn and expecting 8 pounds from 10 pounds of raw Merino, you will be disappointed.

Misaligned expectations on texture: If you want a woolen-spun yarn and the mill has equipment that only runs worsted, you will get worsted-spun regardless of what you asked for. Confirm the equipment matches the preparation you want.

Rush fee surprises: Some mills add significant rush fees if you ask for faster turnaround. Ask upfront: “What would it cost to have this done in 12 weeks instead of 6 months?”

Communication gaps: Many mills are small operations with limited staff. If the mill does not provide regular updates, ask for a timeline check-in schedule before you commit. “Can I get a status update at the halfway point?” is a reasonable question.

Frequently Asked Questions

How do I know if a mill is reputable before sending my fiber?

Look for mills that answer questions thoroughly, provide written estimates with clear scope, and are transparent about their equipment. Ask for references or examples of previous work. Be cautious of mills that give vague answers about pricing or turnaround, or that promise results that seem too good to be true.

Can I send a small amount of fiber (under 10 lbs) for custom processing?

Yes, but your options are more limited. Some mills have minimums as low as 3-5 pounds for roving or combed top. Others require 20 pounds or more. Search the directory for mills that explicitly mention small-batch processing or hand spinner services.

Should I have my fleece washed before sending it to the mill?

In most cases, no. Raw fleece that has been properly skirted and stored is preferable to home-washed fleece. Home washing can felt or damage fibers if done incorrectly. Mills have equipment designed to wash fiber more effectively. If you are sending particularly dirty or high-grease fleece, mention this to the mill and ask for guidance.

What is the difference between roving and combed top for spinning?

Roving is carded fiber with a random fiber orientation that spins into a softer, airier yarn. Combed top is combed to align fibers parallel, producing a smoother, denser, more lustrous yarn. The choice depends on your spinning style and the yarn characteristics you want.

Conclusion

Getting the result you want from custom fiber processing comes down to asking specific questions before you commit. A reputable mill will welcome these questions and have clear answers. Mills that are vague about turnaround, pricing, or their process are worth approaching with more caution.

Use the directory to find mills that match your volume, fiber type, and service needs. Filter by state, minimum order quantity, and services offered. When you find a promising match, contact them with your specific project before sending anything.

The mills that are right for a 200-pound commercial order may not be right for a 10-pound custom hand spinner commission. Finding the fit is what this directory is designed to help with.

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