A buyer searching for Yarn is usually trying to stop a bad substitute. A fabric is specified by fiber, construction, weight, width, and the finish. The notes below are selection criteria for a Yarn. They are not a catalog promise. Confirm every rating on the current datasheet, drawing, or test report for the revision you will receive.
What has to be true of Yarn
A fabric is specified by fiber, construction, weight, width, and the finish. For a Yarn, start from the duty, then the interface to the rest of the machine or the room, then the document that proves the claim. A lower price that leaves one of those blank is a different product.
Yarn is easy to confuse with Woven Fabric. If the quote could be read as either, add the line that separates them: the rating, the fitment, or the standard named below. Link the drawing number to that line so receiving inspection can reject the wrong one.
Numbers that change the quote
| Line | What to write for Yarn |
|---|---|
| Width and length | Usable width and the roll length. |
| Finish | Preshrink, coating, water repellency, or flame retardancy, each with a test if claimed. |
| Color | Lab dip and the light under which it is judged. |
| Care and shrinkage | The shrinkage figure after the stated wash. |
| Fiber | Composition, including elastane if it is there. |
| Construction | Weave or knit, and ends and picks or GSM. |
How to compare two offers
Lay both quotes for Yarn on one sheet and line up width and length, finish, and color. If a cell is empty, the offer is not finished. Ask for the missing line in writing. When those match, the honest difference is lead time, the test evidence, and who carries the warranty. Do not average a fully specified Yarn with a cheaper line that omitted width and length.
Documents worth having before the deposit
Ask for a hang or a test report for any flame or water claim. The file should name Yarn and the revision, not only the supplier’s homepage. A factory quality certificate such as ISO 9001 can sit beside that file. It does not replace it.
Failures that show up after delivery
- Ignoring usable width.
- Approving a hand feel and leaving shrinkage untested.
- Buying coated fabric when the process needs a breathable one.
On a Yarn, the expensive version of the first mistake is discovering it after the goods are in the crate. Put the rejection condition in the purchase order while the supplier can still restate the offer.
A worked RFQ line
Use this shape, then replace the brackets with your duty: “Yarn — State fiber, GSM, width, finish, and shrinkage.” That sentence is a template, not a rating of any brand. If a supplier’s datasheet uses different units, convert them onto this sheet so the next offer can be compared.
Where words like waterproof / IP65 belong
Searches often add a constraint to Yarn: waterproof / IP65, or explosion-proof / ATEX. Keep those on this page. IP65 in IEC 60529 means dust-tight and protected against water jets. Write that code if hoses are the real exposure. The word waterproof alone does not name a test. ATEX or IECEx is a certificate for a zone, a gas or dust group, and a temperature class. An IP rating does not grant it. Skip the mark if the site is not hazardous. If you need a third constraint, add it as another line on the same drawing. A second URL that only swaps the adjective does not give a buyer a second fact.
Related in this section: how to specify Woven Fabric.
Questions buyers actually ask
What should an RFQ for Yarn include?
State fiber, GSM, width, finish, and shrinkage.
Is a cheaper Yarn the same part?
Only if width and length, finish, and the documents match. A missing line is a different offer.
Do waterproof, OEM, or IP words need their own page?
No. For Yarn they are extra lines on this specification. Ask for the test or the drawing that gives the word a value.