Colour Is a Repeat-Order Risk, Not a Cosmetic Detail
For a distributor, the cost of a colour mismatch is concrete: a wholesale cable ties Bahrain order that arrives in two visibly different blacks cannot be split across two customers at the same price. Colour belongs next to tensile strength and dimensions in the purchase specification, because it decides whether a shipment can be resold as one batch or has to be sorted, discounted or claimed against.
The Gulf climate sharpens the issue. Ties used outdoors on construction sites, solar mounting, fencing and cable trays are exposed to strong sunlight, high surface temperatures and dust, and light colours are usually the first to show a change in appearance. In retail packing, buyers compare the ties in the bag against the previous delivery, so even a small shade difference is noticed quickly and raised as a complaint.
This article sets out what a Bahrain importer should define before placing a repeat order. TOBEYHAO confirms the exact material, colour reference and packing for each order in the quotation and proforma invoice.
Lock the Colour Standard Before the First Production Run
The cheapest way to control colour is to approve a physical pre-production sample before mass production starts. Once approved, both sides keep a golden sample labelled with the date, colour code, material and model number. Without a retained reference, a discussion about shade three months later has no basis.
A physical sample is more reliable than a paper or screen reference. Pantone or RAL numbers are useful for internal communication and catalogues, but converting a coated paper reference into a pigmented polyamide part involves different pigments, carriers and surface finishes, so the moulded result may not be identical.
Agree the acceptance criteria in writing: a ΔE limit, the illuminant (D65 is common), measurement geometry, observer angle, and whether the figure is an average of several parts. Also agree who measures, with which instrument, and what happens if a reading falls at the borderline. Many buyers combine an instrument reading with a visual check under a defined lamp, which is practical for factory QC.
Material and Masterbatch Choices That Shift the Shade
PA6 and PA66 do not share an identical natural base tone, so the same colour code placed in the two materials can look slightly different in the finished tie. The material for an order is confirmed in the quotation and PI, and it should be stated in the colour specification as well.
Black is normally produced with carbon black, where dispersion quality affects depth, gloss and streaking. Coloured ties use a colour masterbatch, and the carrier and dosing level influence how stable the shade stays from lot to lot. A supplier that changes masterbatch source or dosage between shipments will show it in the finished product.
Other variables also move the shade: regrind or recycled content, moisture in the granules before moulding, and mould temperature, which changes surface gloss and therefore perceived colour. Storage of finished goods matters too, since long storage, heat and direct sunlight affect appearance, most visibly in natural and light shades.
Lot Verification: What to Check and What to Record
Compare against the golden sample only under the same lighting. A bag viewed under warehouse strip lights and a sample viewed in daylight will never match, and that single error causes most avoidable colour disputes.
Keep simple records for each lot: batch or lot code, production date, colour code, material, masterbatch lot and, where available, the machine. Retain a sealed sample from each shipment and store it away from sunlight and heat, so a future comparison is meaningful.
The sampling plan should be agreed in the purchase order: sample size per lot, how many parts are measured, where on the part is measured, and the acceptance level. Alongside measurement, confirm that bag labels match the contents and that cartons contain one colour only.
Packing and Labelling Rules That Prevent Mixed-Colour Shipments
As a rule, one colour per bag and one colour per carton. Mixed cartons are sometimes accepted in small trial orders, but they must be agreed in writing and clearly marked, because mixing creates picking errors at the distributor's warehouse and returns from retail customers.
Standard packing is commonly 100 pieces per bag, while carton quantity varies by size; the confirmed figure belongs in the quotation. Carton gross weight, net weight and dimensions should be stated, because they feed directly into freight, customs and warehouse planning.
Labels should carry the colour name, the internal colour code, model, size and quantity, with OEM labels available where the buyer needs its own artwork and language. After arrival, keep bags closed and store them away from direct sunlight and heat sources. Import and labelling requirements should be checked with a local broker or the relevant authority, since these change.
Specification Fields for the RFQ and Purchase Order
A short, complete specification removes most colour arguments before they start. The fields below can be copied into an enquiry or purchase order and completed with the supplier during quotation.
Where a value is not yet fixed, write that it is to be confirmed in the quotation rather than leaving it blank, so both sides know it is still open.
- Colour name and internal colour code, plus the golden sample reference number.
- Reference standard: approved physical sample, Pantone, RAL or customer swatch.
- Acceptable ΔE and measurement conditions, or the agreed visual comparison method.
- Material PA6 or PA66, surface finish, and whether recycled content is permitted.
- Pieces per bag, bags per carton, carton net and gross weight, carton dimensions.
- Bag labels and carton markings, colour coding, OEM label artwork and language.
- Pre-production sample approval step and retained samples per shipment.
- Document list required by the buyer's customs broker, confirmed locally.
Frequently asked questions
Can the colour match my previous order exactly?
With a retained golden sample and a written ΔE tolerance, variation between lots can be kept under control, but small differences within the agreed tolerance are normal in pigmented plastics. The tolerance, material and colour code should all be confirmed in the quotation and PI before production.
Does black fade on outdoor installations in Bahrain?
Black ties are generally based on carbon black, which behaves differently from light colours under sunlight, but appearance also depends on exposure time, loading conditions, material grade and any additives. State the expected service conditions in the enquiry so the material and any UV-related requirements are confirmed in the quotation.
Do I need a Pantone number to place an order?
Not necessarily. A physically approved sample is the most reliable reference. A Pantone or RAL number is useful as an additional communication tool, but it cannot replace a moulded sample because paper and plastic render colour differently.
How are different colours separated in packing?
The practical approach is one colour per bag and one colour per carton, with the colour name and internal code printed on both the bag label and the carton. Standard packing is commonly 100 pieces per bag and carton quantity varies by size, so the exact figures are confirmed for each order.
Is a shade difference a valid quality complaint?
It is valid only against a criterion agreed before production. If the purchase order states a colour code, a golden sample and a ΔE limit under defined lighting, a complaint can be assessed objectively. Without those three items, a shade dispute usually becomes a negotiation rather than a quality decision.