How to Check a PP Mat Sample Before You Pay for Bulk

A sample is not a gift from a factory. It is evidence. Treat it that way and it will save you money. Leave it rolled in the corner until the bulk order is placed and it tells you nothing.

We charge for samples and credit them against your order. That is deliberate. A paid sample should be worked hard before 500 pieces per design go on a loom for you. Here is the routine we would run if we were buying, based on what we check at Jalgaon before mats leave us. It takes about ten minutes, plus a kitchen scale.

Before you unroll it

Note how it arrived. Was it folded or rolled the way your customers will receive it? Does it carry the bag, label or header you discussed, or a plain substitute? Packing decided at sample stage is packing you can plan around. Packing improvised at shipment stage is where delays start.

Keep one sample untouched if you can. Work on the other. And ask for a cut swatch with the sample so you can weigh for GSM without cutting the only piece you have. The full process behind the sample is in how polypropylene mats are made.

1. Measure it, then measure the diagonals

Lay it flat and let it settle. Measure length and width corner to corner. A mat sold as a finished size should measure that size, not near it.

Then measure both diagonals. They should match. If one diagonal is longer, the mat is out of square. It may still look fine rolled up. On a patio it will sit with one corner lifting or a border that will not line up with decking. Customers notice. Retailers get the return.

Write the numbers down. "Looked about right" is not a record you can use when bulk arrives.

2. Check the weight properly

GSM is grams per square metre. We work in 300 to 600 GSM, and the right weight depends on use, as the PP mats page explains.

Take your 10 x 10 cm swatch, weigh it, multiply by 100. Compare that number with the quote. Also pick up the whole mat. Does the feel match the number? A swatch that checks out but a full mat that feels thin in the middle is worth a question. Ask it now, in writing, while it is still a sample conversation.

Do not chase the heaviest mat as a shortcut to quality. A beach mat that must fold into a bag has a different job from a 9x20 ft RV mat. Weight has to suit the use.

3. Run your thumb along the edge

Edges fail first. Chair legs, dragging, folding in the same place, tent pegs nearby. Run your thumb slowly along all four sides. The finish should feel secured and even, not loose, rough or sharp.

Give the edge a modest pull. You are not trying to tear the sample apart. You are finding out whether the finishing was done with care or done quickly. If an edge feels uncertain on day one, a season of use will not improve it.

Check the corners twice. That is where poor finishing often shows first.

4. Look at the pattern, then turn it over

Sight down a stripe, border or straight line in the design. Straight lines should stay straight. Wavy lines can point to tension problems on the loom, and they do not correct themselves in bulk.

Turn the mat over. On a woven mat the pattern is built in during weaving, so the reverse shows the design in reversed colours. That is what reversible means in practice. If the back looks like a pale print backing, you are looking at something different from what we make. Know which one you are buying.

Check colour in daylight if you can, not only under office lights. Then keep your approved sample flat and stored away from strong light so you have a clean reference when bulk arrives.

5. Pour water on it, shake it, fold it

Pour a glass of water across the surface. On woven polypropylene, water should sit and run off rather than soaking in as it would into a natural fibre. Tip the mat and shake it. That tells you how it will behave after rain or a wash down.

Fold it the way a customer will. Does it fold without fighting you? Does it go back into its bag? Leave it folded overnight and open it next morning. Some creasing after folding is normal life for a woven mat. A fold that refuses to settle at all is worth noting.

For outdoor ranges, leave a chair leg on it for a few hours and move it around on a rough surface. You are simulating a small, honest piece of real use. Better on a sample than on a container load.

6. Compare paper against sample

Now go back to the quote. Finished size, GSM, design name, colours, packing, label, price basis, lead time. Our normal terms are on the export and wholesale page: 500 pieces per design, 30-45 days production, FOB Nhava Sheva or CIF.

Anything vague on paper will stay vague in bulk, only bigger. "Approx size", no GSM, no packing detail. Get those fixed in the order, not in a complaint email later.

What to do if something is off

Say so, with your numbers. "Diagonals differ by 2 cm, swatch weighs X against quoted Y GSM, left edge feels loose" gets a useful answer from any serious factory. "Quality not good" gets a polite reply and nothing changes.

At Streamflow, we would rather argue about a swatch weight at sample stage than about a shipment at Nhava Sheva. That is the whole point of sampling. Since 1994 we have learned that the buyers who check hardest at the start are usually the easiest to work with later, because both sides know what was approved.

When your sample passes, keep it, label it with the date and order reference, and compare the pre-shipment piece against it. Sample against sample. That habit will do more for your range than any catalogue claim, ours included. Start from the sizes and weights on our outdoor rugs page, or send us your target size and use and we will send the right sample to check.

Keep a one-page sample record

Write the date, supplier, design, measured size, both diagonals, swatch weight, calculated GSM, and edge, colour, water and fold notes on one page, and photograph the sample flat next to a tape measure. Sign it when you approve it. That page becomes the reference for the bulk order, the pre-shipment check and any discussion later. Without a record, approval becomes a memory, and memories differ between offices. With one, anyone in your team can repeat the same checks on the bulk piece in the same order and compare numbers like for like.

Frequently asked questions

How long should sample checking take? About ten minutes for size, diagonals, GSM, edge, pattern and water checks, plus leaving it folded overnight if pack format matters.

How do I check GSM without laboratory equipment? Weigh a 10 x 10 cm cut swatch and multiply by 100. A kitchen scale is enough for a buying check.

Should I cut my only sample? No. Ask the factory to include a cut swatch with the sample, or order a second sample for destructive checks.

Are Streamflow samples free? Samples are paid and credited against your order. Minimum bulk order is 500 pieces per design.