How Knitwear Factories Prepare Wool and Cashmere Yarn Before Knitting Starts

Why yarn preparation decides the final garment

A knitted sweater is a single continuous structure. Unlike woven fabric, where a defect can be cut away and the panel replaced, a knitting fault runs through the whole piece. That is why knitwear quality is largely determined before the machines start.

Three properties of the incoming yarn propagate directly into the finished garment:

• Dimensional stability. Yarn that has not been relaxed will continue to shrink after knitting, so the wash-test dimensions drift from the approved size chart.
• Surface consistency. Variations in count or twist between lots knit into visible horizontal bands, known in the trade as barry lines or barré.
• Shade consistency. Panels knitted from different dye lots read as different tones under retail lighting, even when the colour number matches.

All three are preventable at the yarn store, and all three are expensive to correct after knitting.

The four yarn-preparation gates

A disciplined factory treats yarn preparation as a sequence of gates, each with a documented pass condition. The table below is the sequence used at Qirui Textile.

Fibre selection: cashmere, wool, and blends

The fibre decision drives price, hand-feel, and care instructions, so it is normally settled with the buyer before yarn preparation begins. The comparison below covers the fibres currently used across the Qirui product range.

Blends are common because they let a buyer tune cost against performance. A 70/30 cashmere-wool blend, for example, keeps much of the softness while improving tensile strength and reducing cost per garment.

Yarn count, ply, and twist

Count describes yarn thickness; ply describes how many strands are twisted together; twist describes how tightly. These three numbers determine how the yarn behaves on a flat knitting machine.

For heavier garments, weight per piece becomes a useful verification number. In the current Qirui range, a men's heavy cable-knit crew neck is specified at 390–460 g, a men's lapel cardigan at 530–560 g, and a women's cropped turtleneck at 220–225 g. Weighing finished garments against these bands is a fast, low-cost check that the yarn count actually delivered matches the yarn count specified.

Colour approval and lab-dip discipline

Colour problems are the most common source of buyer-supplier dispute in knitwear, and almost all of them trace back to an incomplete approval step. A workable colour protocol has three parts:

• Lab dip against an agreed standard. The buyer approves a physical dip, not a screen rendering, and the approval is dated and signed.
• Specified light source. The same colour reads differently under D65 daylight and under store tungsten. Tolerance must be agreed under a named illuminant.
• Delta-E tolerance in writing. A numeric limit replaces subjective judgement and gives both sides a pass/fail test.

Where a buyer supplies a reference swatch rather than a Pantone number, the factory should return the closest achievable dip with an honest delta reading rather than claiming an exact match.

Relaxation, conditioning, and moisture regain

Natural fibres absorb moisture from the air. Cashmere and wool reach equilibrium with ambient humidity, which means the same yarn can knit to slightly different dimensions on a dry winter day than in a humid summer one.

Two practices control for this:

• Resting the cones. Yarn is allowed to stand after winding so internal tension equalises before it is fed to the machine.
• Conditioning the knitting floor. Temperature and relative humidity are held in a stable band, and the same band is used for the pre-production sample and bulk.

This is why a factory that samples in a controlled room and then bulk-produces in an uncontrolled one will pass the sample and fail the shipment, even though nothing changed in the design.

Pre-knitting inspection checklist

Before a lot is released to the knitting floor, the following should be signed off. This is the checklist format Qirui Textile applies to bulk orders.

What goes wrong when yarn preparation is rushed

The failures below are the reason this stage exists. Each has a specific, recognisable symptom on the finished garment.

The pattern is consistent: the cost of correction is orders of magnitude larger than the cost of the check. A yarn count measurement takes minutes; re-knitting a bulk order takes weeks.

What buyers should ask a knitwear supplier

When evaluating a knitwear manufacturer, these questions distinguish a factory that has a yarn-preparation system from one that simply orders yarn and starts knitting:

• Can you show yarn lot numbers and fibre composition certificates for a recent order?
• Do you approve colour by physical lab dip, and under which light source is tolerance measured?
• What is your numeric delta-E tolerance, and is it written into the order confirmation?
• Is the knitting floor humidity-controlled, and is the same environment used for sampling and bulk?
• What is your weight tolerance per garment, and do you weigh every piece or sample it?
• What happens to a yarn lot that fails incoming inspection?

A supplier that answers these with specific numbers and documents is a lower-risk partner than one that answers with assurances.

Frequently asked questions

Does yarn preparation differ between cashmere and wool?

The gates are the same, but the tolerances tighten for cashmere. Cashmere fibres are finer and more sensitive to mechanical stress, so relaxation times are longer and handling is gentler. Cashmere also shows shade variation more readily, which makes lot segregation stricter.

Why do two sweaters in the same order sometimes look slightly different in colour?

Almost always a dye-lot issue. If yarn from two dye lots is knitted into one order without segregation, the difference becomes visible. The fix is to require a single dye lot per colour per shipment, or to approve the split in advance.

How long should yarn rest before knitting?

It depends on fibre, count, and how the yarn was wound. The practical answer is that resting continues until the yarn measures consistently against the tech-pack count and twist, and until the pre-production panel washes within dimensional tolerance. Fixed hour counts without a measurement are a weak control.

Can a buyer specify yarn count directly?

Yes, and it is good practice. Buyers who specify fibre composition, count, ply, twist, and weight per garment give the factory an unambiguous target, which makes first-sample approval faster and bulk disputes far less likely.

Does yarn preparation cost the buyer anything?

It is built into the unit price, but it is far cheaper than the alternative. Yarn verification, lab dips, and conditioning add a small amount of lead time at the front of the order. Re-knitting a rejected shipment adds weeks and often the whole margin.

Related reading

• Gauge, stitch structure and inline QC: how knitwear quality is controlled on the machine
• Knitwear size grading, fit and finishing: turning an approved sample into a size run