From sample to bulk: what changes between the approval and the first carton

A buyer approves a sample, places the order, and six weeks later opens a carton that looks almost right. The leg is a touch shorter. The navy is a shade warmer. Nothing is wrong enough to reject, and nothing is quite what was signed off.

Most of these gaps have the same origin. A sample is a controlled event. Bulk is a process. The work between them is making the process reproduce the event, and it has a fixed order.

Step 1. Proto: does the idea work?

The first sample answers one question: can this design be knitted as drawn, at this needle count, in this yarn? We use stock yarn in the nearest colour and do not wait for dye lots. Expect two to three weeks. Approve the construction, the pattern and the feel. Ignore the colour. It is not the final colour, and judging it now costs a week of back and forth.

Step 2. Fit and size set

Once the construction is agreed, we knit the full size range and grade it against a measurement sheet: leg length, foot length, cuff width, relaxed and stretched. This is where leg length is locked. It is also where the buyer's fit model gives an opinion, and where we would rather hear it than after 20,000 pairs.

Step 3. Lab dips and yarn commitment

Colour is matched in yarn, not in the sock. Each shade goes to the dye house as a lab dip against your standard, and comes back for approval, usually two or three options per colour. Approving lab dips is the moment yarn gets ordered, and yarn is the longest-lead item in the whole programme. A lab dip that sits on a desk for ten days moves ship date by ten days. Nothing else in the process does that.

Step 4. Pre-production sample

This is the sample bulk will be judged against: approved yarn, approved colours, final trims and packaging. It is knitted on the production machine with the production settings, and we keep a sealed pair. When a buyer asks "is bulk the same as the sample?", this is the sample we mean. Everything before it was a draft.

Step 5. Bulk, and what we check

From here, bulk is a matter of holding the pre-production sample across many machines and dye lots. The checks that matter:

• First-off inspection. The first pairs from every machine are measured against the sealed sample before the machine is released to run.
• Dye lot control. A single colourway may draw on several lots. We keep lots together within an order, so one shipment does not mix two navys.
• Boarding and measurement. Every batch is boarded on the same forms as the pre-production sample, then measured again. Boarding is where leg length drifts if nobody is watching.
• Final inspection. AQL sampling by colourway and size before packing. Buyers with their own inspectors are welcome; the data is the same either way.

What moves ship dates

Three things, in order of how often they happen:

1. Late lab dip approval. Yarn cannot be ordered until colour is signed.
2. Trim artwork changes after the pre-production sample. Cards and labels have their own suppliers and their own minimums.
3. Quantity changes after yarn is dyed. More is sometimes possible; a different colour split usually is not.

Lock these three early and a 45-day bulk lead time holds. Leave them open and the calendar belongs to the dye house.

One sealed sample, one measurement sheet

If you remember one thing: keep the sealed pre-production sample and the measurement sheet, and compare every delivery against them. It takes five minutes a carton, and it turns "something feels off" into a sentence a factory can act on.

Written by Sunny, Valortex Inquiry Desk. Reviewed by the production team.