The five lines that decide the quote
When an enquiry arrives with these five items, the quotation usually comes back the same day. When one is missing, the supplier must either guess or wait — and guesses become claims later.
- Material and grade. DOP, DOTP or paraffin for PVC; SBR, EPDM or NBR for rubber. If you need food-contact, flame-retardant or anti-static, say it on this line.
- Dimensions and tolerance. Thickness, width or profile section, and which dimension actually matters. "3 mm ± 0.2" and "around 3 mm" price differently.
- Colour and finish. A RAL number or a physical sample reference. Clear, amber, opaque and ribbed are all standard PVC options — custom colours are possible but change the lead time.
- Quantity and format. Metres, pieces, m² or kilograms — and whether you want rolls, sheets, panels or cut profiles. Quantity drives minimum order and price break.
- Application environment. One sentence: "freezer doorway, pallet traffic, washed down daily". This is where the supplier catches problems the other four lines don't reveal.
Tolerances: where accuracy is worth paying for
Every extra decimal place on a dimension costs setup and inspection time. Specify tight tolerances only where the dimension is functional — a strip width that must fit a rail channel, a mat thickness that must meet a machine bed level. For everything else, standard commercial tolerances price better and arrive faster.
Sample rule. If the part is new, ask for a sample run against the written specification before volume production. Approving a sample converts the spec from words into a physical reference both sides keep — this is standard practice on our lines and it is the cheapest dispute insurance available.
Standards and documentation: ask early
If your market requires declarations — food contact, flame retardancy, REACH compliance, anti-static performance — put them in the first enquiry, not after the price is agreed. Documentation is easier to arrange before the compound is mixed than after. Telling the supplier the destination market ("this goes into a German food plant") is usually enough for them to name the right documentation.
Minimum orders: why they exist and how to work with them
Minimums exist because every grade change on a line consumes time and material. They are not arbitrary: 100 m for conveyor belt, 100–200 m² for matting, 500 pieces for interlocking pavers reflect real changeover economics. Two honest ways to deal with a minimum that exceeds your need: combine several grades in one shipment, or ask which of your requirements a standard stock grade already meets — the answer often cuts the order below the minimum.
What a good supplier reply should contain
A complete quotation names the compound, the dimensions with tolerance, the format, the minimum order, the lead time, and the documentation included — not just a price. If a quote arrives with only a number on it, send the five lines again and ask for the gaps in writing. The quality of the first reply is the best predictor of the quality of the shipment.