Textile Product Lifecycle — Phase 6: Pre-Production Sampling

Textile pre-production sampling follows a five-stage sequence — proto/development sample, lab dip (colour confirmation against Pantone TCX reference), fit/size set, strike-off (print or embroidery artwork), and pre-production (PP) sample — each of which must be approved in writing before the next stage begins. The PP sample is the contractual reference against which the entire bulk shipment is inspected at final AQL: without a signed PP approval letter, there is no agreed standard and no defensible basis for refusing bulk goods. The number of sampling rounds required is directly related to Tech Pack completeness — a well-specified Tech Pack achieves PP approval in two rounds; an underspecified brief runs five or six, adding 4–8 weeks and significant cost to the development critical path.

The Sampling Sequence

Proto and Development Samples

Development samples are typically made in the closest available fabric — not necessarily the specified bulk fabric — to confirm that the design works in three dimensions. Review them for construction logic (do the seams work?), design intent (does it look like the brief?) and proportion (are the measurements roughly right?). Do not reject a development sample for colour — colour is confirmed by lab dip, not by a development sample made in substitute fabric.

Lab Dips

A lab dip is a small swatch of bulk fabric dyed to the target colour. It must be evaluated against the Pantone TCX or CCI colour reference specified in the Tech Pack, under the correct light source (D65 daylight for most markets, supplemented by A-light for metamerism checking). Approve in writing with the lab dip number, lot reference and any notes on acceptable shade deviation. Verbal approvals over video call are not sufficient — they cannot be referenced if bulk colour is disputed later.

The PP Sample: Its Legal Role

The pre-production sample is the contractual reference against which the bulk shipment will be inspected. It should be made in approved bulk fabric, approved trims, to the approved measurement specification, with final labels and packaging if visible. The PP sample approval letter (written, dated, signed by a buyer-authorised person) forms part of the contract with the factory. Without it, there is no agreed standard — and no defensible basis for rejecting bulk goods.

• Always retain the approved PP sample sealed in a bag with the approval letter stapled to it — this is your physical reference.
• Specify the tolerance acceptable in bulk: e.g. 'colour: 1.0 DE CMC maximum; measurements: ±1cm on chest, ±2cm on body length'.
• Confirm in the approval letter that the factory has an identical sealed sealed sample on site as the bulk production reference.
• If any changes are made to specification after PP approval, a revised PP sample must be approved before bulk continues.

Managing Sampling Revisions

Each sampling round typically involves comments, revision and re-submission. The number of rounds required is directly related to the completeness of the Tech Pack. A well-specified Tech Pack with precise material, construction and measurement data typically achieves PP approval in two rounds. An underspecified brief can run five or six rounds before a factory can satisfy the evolving requirements — adding 4–8 weeks to the critical path and significant development cost.

The PP sample approval letter is the contractual anchor for the pre-shipment inspection — inspectors compare finished bulk units against the sealed PP sample. Submit your product requirements in the sourcing RFQ form to begin the sampling process with in-country review included.