You choose a warm beige curtain fabric at Canton Fair. The swatch looks right beside your shop's existing range. After the meeting, the mill sends several small dyed pieces and asks which one it should use for production. Your buyer picks a photograph on a phone. Later, the sewing factory receives fabric from different dye lots, and two panels intended for the same window look different. The colour name stayed the same throughout the order; your team never agreed how to approve or allocate the actual fabric.
The curtains and approval problem below are fictional illustrations, not customer transactions or a textile testing standard. This article is general information, not colour-science, production, legal, tax or investment advice. A qualified textile specialist must select the comparison conditions, tests and acceptance criteria for the actual fabric and use. Sample approval does not guarantee a uniform production lot.
Name the fabric as well as the colour
Your buyer should identify the chosen colour reference alongside the fibre composition, construction and finish of the fabric being ordered. If the mill proposes another material or process, have the textile reviewer assess that proposal before extending the colour approval. An attractive beige on the booth swatch gives the mill too little instruction for a changed fabric.
Agree what each submitted piece represents. A lab dip is a small dyed sample offered for colour review; a booth swatch may come from an earlier production run. Your supplier should identify the submission, its fabric and process, and any differences from the intended bulk run. The reviewer needs those facts when deciding what the sample can establish.
The sample-reference guide covers who holds an accepted specimen and how the parties identify it. For these curtains, retaining a swatch is part of the record. You also need an agreement about reproducing and checking its shade on the ordered fabric.
Compare identified submissions under agreed conditions
Ask your textile specialist to define how the buyer and mill will compare colour. The review brief should cover the relevant viewing conditions, specimen preparation and any instrumental assessment the specialist requires. Choose those conditions for the product's intended use, rather than accepting whichever lighting makes a submitted piece look closest.
For the fictional curtains, your reviewer may need to consider how the fabric looks in the lighting where customers will use it, as well as the agreed inspection conditions. A phone photograph helps identify which submission you mean, but it does not establish a reproducible colour comparison. Your colleague at the mill needs the same reviewed method and reference as your buyer.
If the reviewer uses a measured colour difference, have them state the method and acceptable result for this assignment. There is no universal number in this article. Your team should know who reviews a borderline submission and whether the mill may proceed while that review remains open.
QIMA's textile-testing page lists colourfastness assessments and dimensional-stability testing among its services. Colourfastness concerns resistance to colour change or transfer under the chosen test; your buyer still needs to approve the initial shade. Have the specialist distinguish those questions in the test brief rather than treating a colourfastness result as approval of the beige you ordered.
Separate lab-dip acceptance from permission to dye the bulk
Give the supplier an identified approval that states which lab dip your buyer accepts and what work it authorises. If your agreement requires another production submission before the full run, record that requirement before the mill commits the fabric. Agree the relevant costs and timing with the contracting seller.
A small sample and production fabric come from different quantities and may involve process differences. Ask the supplier which differences it expects and what evidence it will submit for review. Your specialist can then define the appropriate bulk comparison and sampling arrangement. Do not let the seller infer approval of the whole order from a message saying that one photographed piece looks good.
A short purchasing record could contain these fields:
| Approval field | What the curtain buyer and supplier agree |
|---|---|
| Product and reference | Fabric specification, finish and identified colour specimen |
| Lab-dip submission | Submission ID, relevant process and differences from bulk production |
| Comparison method | Specialist-defined conditions, assessments and acceptance criteria |
| Production permission | Named approver, accepted submission and scope of authorised dyeing |
| Bulk evidence | Identified production lots, required specimens and reviewer decision |
| Variation or substitution | Who assesses it and which work needs renewed approval |
These are editorial purchasing fields, not a dyeing procedure. The revision-approval guide helps your team record an agreed change when the material or finish changes. Your textile reviewer must assess its effect on the shade approval.
Allocate accepted shade lots to the finished goods
Have the mill identify the actual dye lots and fabric quantities it supplies. The sewing factory should retain the connection between those lots and the finished products. For curtain pairs, discuss with your reviewer whether panels within a pair and goods displayed together need a particular matching arrangement.
The buyer can accept identified lots while restricting how the sewing factory uses them. That decision needs enough fabric and traceability to execute. Ask the supplier to explain how it will separate the lots through cutting and packing, and how the inspector will locate the relevant products. An approval tied to one lot should not disappear into a general instruction for beige curtains.
QIMA's sample-management description includes reference specimens for comparison. It does not establish that unseen fabric matches an approved specimen. Define the production assignment with your contractor; the independent-inspector guide covers selecting that contractor and agreeing its scope.
Decide what happens to an off-shade lot
If a production submission differs from the accepted reference, your buyer and specialist should assess the identified lot before agreeing its use. Possible proposals include rework, an accepted variation for a stated quantity, or exclusion from the intended curtain order. The seller must confirm what it can do, at what cost and with which effect on delivery.
Record any accepted deviation with the lot and finished-goods allocation it covers. Do not approve a changed beige for this batch and leave the mill uncertain whether it has become the reference for future orders. If the parties already committed to production, use their agreed contractual change process; an internal rejection does not settle the commercial consequences.
Use pay an invoice to ask A2vanta about the agreed supplier payment before funding. Your textile reviewers and supplier approve and produce the colour. Payment handling does not select a shade tolerance, inspect dye lots or certify that curtains match.