Oxford fabric Specification: What Each Number Actually Changes

The denier figure gets specified to two decimal places; coating weight at 15-60 gsm per pass is the one that decides whether the lot is usable.

Oxford fabric: why the headline number is the least useful one

Every quotation leads with denier. It is easy to compare and it is the number the factory can hit most cheaply. But it tells you almost nothing on its own: denier sets the frame, and the parameters below set whether the product survives its first year in service. A buyer who compares only the headline figure is buying a sample, not a supply agreement.

For Oxford, the practical rule is to fix the headline figure at the level your product needs and then spend your negotiating attention on coating weight and hydrostatic head. Those two are where cheap goods differ from adequate goods, and they are usually absent from the quotation sheet.

The oxford fabric numbers that decide performance

Read the table as a set of trade-offs rather than a checklist. Moving any single line usually costs money somewhere else, and the cheapest way to hit one figure is often to let another slip.

Denier

Typical range: 210D / 420D / 600D / 840D / 1680D. Yarn size. It sets tear strength and hand far more than coating does.

Coating type

Typical range: PU / PVC / PE / none. PU is soft and breathable-ish; PVC is cheaper and stiffer; PE is for disposable goods.

Coating weight

Typical range: 15-60 gsm per pass. Two light passes beat one heavy pass for flex durability.

Hydrostatic head

Typical range: 800-5000 mm. Water resistance. 800 mm is shower-proof, 3000 mm handles sustained rain.

Base weight

Typical range: 90-260 gsm before coating. Price driver and freight driver. Buyers often compare coated weight and get misled.

Denier: range, tolerance and the clause

For Oxford fabric, the working range is 210D / 420D / 600D / 840D / 1680D.

How to choose a denier option

These are alternatives, not points on a scale. Denier is chosen by the application rather than by price, and a supplier who quotes one option as if it were interchangeable with another is quoting a different product.

The figure that decides the outcome is not denier itself but the tolerance around it. A supplier who quotes 210D / 420D / 600D / 840D / 1680D without a tolerance has not quoted a specification, and the first lot will define the tolerance for you.

How to measure denier

The reference method here is Hydrostatic head, run to AATCC 127 / ISO 811, with an acceptance of 800 / 1500 / 3000 mm by end use.

A marginal pass on denier tells you the process is running at the edge, which is the information you need before the next lot rather than after it.

The clause to write for denier

Denier appears with a tolerance and a test, not as a standalone number.

600D polyester oxford, 2-pass PU coating with primer, 1500 mm hydrostatic head, 155 cm usable, 62 gsm total coating, tear >= 25 N, Pantone 19-4052 TCX, hydrolysis-resistant

Coating type: range, tolerance and the clause

For Oxford fabric, the working range is PU / PVC / PE / none.

How to choose a coating type option

These are alternatives, not points on a scale. Coating type is chosen by the application rather than by price, and a supplier who quotes one option as if it were interchangeable with another is quoting a different product.

The figure that decides the outcome is not coating type itself but the tolerance around it. A supplier who quotes PU / PVC / PE / none without a tolerance has not quoted a specification, and the first lot will define the tolerance for you.

How to measure coating type

The reference method here is Tear strength, run to ASTM D2261 tongue tear, with an acceptance of >= 25 N for 600D bag goods.

For coating type, two instruments that both claim the same standard can differ by enough to move a marginal lot from pass to fail.

A marginal pass on coating type tells you the process is running at the edge, which is the information you need before the next lot rather than after it.

The clause to write for coating type

Coating type appears with a tolerance and a test, not as a standalone number.

Coating weight: range, tolerance and the clause

For Oxford fabric, the working range is 15-60 gsm per pass.

What 15-60 gsm per pass does not tell you

The figure that decides the outcome is not coating weight itself but the tolerance around it. A supplier who quotes 15-60 gsm per pass without a tolerance has not quoted a specification, and the first lot will define the tolerance for you.

How to measure coating weight

The reference method here is Tensile strength, run to ASTM D5034 grab, with an acceptance of >= 400 N warp for 600D.

A marginal pass on coating weight tells you the process is running at the edge, which is the information you need before the next lot rather than after it.

The clause to write for coating weight

Coating weight appears with a tolerance and a test, not as a standalone number.

Hydrostatic head: range, tolerance and the clause

It also explains why hydrostatic head is the first line a buyer loosens and the last line a claim refers to.

What 800-5000 mm does not tell you

The figure that decides the outcome is not hydrostatic head itself but the tolerance around it. A supplier who quotes 800-5000 mm without a tolerance has not quoted a specification, and the first lot will define the tolerance for you.

How to measure hydrostatic head

The reference method here is Coating adhesion, run to ISO 2411, with an acceptance of >= 6 N/50 mm.

A single sample from the top of a roll tells you about the top of that roll, and hydrostatic head varies more across a run than most buyers expect.

A marginal pass on hydrostatic head tells you the process is running at the edge, which is the information you need before the next lot rather than after it.

The clause to write for hydrostatic head

Hydrostatic head appears with a tolerance and a test, not as a standalone number.

Base weight: range, tolerance and the clause

Price driver and freight driver. Buyers often compare coated weight and get misled.

For Oxford fabric, the working range is 90-260 gsm before coating.

What 90-260 gsm before coating does not tell you

The figure that decides the outcome is not base weight itself but the tolerance around it. A supplier who quotes 90-260 gsm before coating without a tolerance has not quoted a specification, and the first lot will define the tolerance for you.

How to measure base weight

The reference method here is Colour fastness to light, run to ISO 105-B02, with an acceptance of >= grade 4.

A marginal pass on base weight tells you the process is running at the edge, which is the information you need before the next lot rather than after it.

The clause to write for base weight

Base weight appears with a tolerance and a test, not as a standalone number.

A specification without a test method is a preference. It becomes a requirement when the method and the acceptance value are both named, because then a substitution is visible.

How to write an Oxford specification that protects you

A specification is only useful if a substitution becomes visible. That means writing the construction and the performance together, and naming the test that proves each one. For Oxford, the clause has to pin coating weight and hydrostatic head, because those two separate a compliant lot from an adequate one:

600D polyester oxford, 2-pass PU coating with primer, 1500 mm hydrostatic head, 155 cm usable, 62 gsm total coating, tear >= 25 N, Pantone 19-4052 TCX, hydrolysis-resistant

Note what is missing from that line: adjectives. No ‘high quality’, no ‘premium’, no ‘export grade’. Every clause is either a number with a tolerance or a named test. If a supplier cannot quote against a line written this way, that is information about the supplier.

Oxford fabric: where the specification usually breaks down

The first failure is coating peeling. The PU film lifts at folds and along stitch lines within a season. The cause is usually under-cured coating, too heavy a single pass, or no primer on the base fabric. The test that exposes it before you order: ISO 2411 peel strength plus a 5000-cycle flex test at the fold.

The second is hydrolysis in storage. New rolls smell acidic and the coating turns tacky after a few months in a hot warehouse. It comes from moisture plus heat attacks the pu; common with cheap polyester-based pu in tropical ports. Test with 70 C / 95 % RH for 7 days, then re-test adhesion and hand. and write the result into the purchase order, not just the enquiry.

Both failures share a pattern: they appear months after delivery, they are hard to attribute, and the cost lands on the buyer rather than the mill. That is exactly why the test belongs in the specification and the report belongs in the shipment file.

What to put in an Oxford enquiry

1. End use and the conditions, which together decide where coating weight has to sit inside 15-60 gsm per pass.
2. The one figure that must hold, with hydrostatic head named as the proof.
3. Quantity per colour and per delivery, against a typical MOQ of 500-1000 m per colour.
4. Destination market, because compliance changes the construction, not just the paperwork On oxford fabric that is denier at 210D, 420D, 600D, 840D or 1680D.
5. A physical standard viewed under a stated light source, not a screen proof For oxford fabric it is coating weight at 15-60 gsm per pass that settles it.

With those five points we can quote against a real requirement instead of a generic range. Full ranges sit on the Oxford page, and the manufacturing side of the same question is on our quality control page.

Questions buyers ask before ordering

Can you hold tolerance at 15-60 gsm for oxford specification explained on a repeat order?

On oxford specification explained, ask for tolerance as 15-60 gsm in writing; a supplier who will not commit is quoting a different product.

What drives the price of oxford specification explained at tolerance of 15-60 gsm?

On oxford specification explained, set tolerance at 15-60 gsm and the rest of the order follows; leave it open and the mill decides for you.

Is 15-60 gsm achievable at our volume on oxford specification explained?

On oxford specification explained, we quote 15-60 gsm and test to third-party report.

Oxford fabric: failure modes worth a clause in the purchase order

The other two, with acceptance numbers attached, are in the full failure analysis for Oxford.

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