- Karaca Çanta
- 6 min read
Short answer: Quality control points in bag production fall under six headings: fabric and fabric weight, stitching or welding line, handle attachment, size tolerance, print and packing. As a buyer you can turn these into a written specification before the order, and at delivery into a simple check done by sampling. In Karaca Çanta's process there is an inspection and shipping step after production; the criteria and the sample question are settled at the quote stage.
In a bag order, defects sometimes appear on first loading: the handle shifts, a seam opens, the logo drifts to one side. Most of these are things that can be noticed during production and caught by eye at delivery.
This article approaches quality control from two sides: which points are monitored in production and what you can look at on delivery as a buyer. We make no laboratory claims; what is described are checks that can be done by eye, by hand and with simple measurement.
At Which Stages Is Quality Control Carried Out?
Quality control is not a single last look; at every stage the bag meets a different question. When the fabric arrives, do the fabric weight and colour match the order; in cutting and stitching, are the size and the line correct; in printing, is the logo in the right place and the right colour; in packing, are the quantity and label complete? An error caught at an early stage is far easier to correct than one caught after shipping.
As a buyer you cannot see all of these stages; there are two points you will see: the design approval before printing and the moment of delivery. That is why putting your expectations in writing in advance is far more useful than just saying "it looks fine" at delivery. At Karaca Çanta the process runs in the order of request, quote, design and approval, production and printing, inspection and shipping.
How Are Fabric and Fabric Weight Checked?
Fabric weight is the weight of the fabric per square metre; the most precise check is to weigh a piece of known area on a precision scale and convert it to a square metre. Most buyers do not do this and do not need to. The practical way is this: place the bag delivered next to the sample you approved, compare the thickness, fullness and stiffness by hand, and look at how sparse the fabric is by holding it up to the light.
On a nonwoven bag the uniformity of the surface is also checked: there should be no thinned area, stain, creasing or fibre fraying at the edge. When you lay bags from different cartons side by side, the colour tone should look the same. Having your target fabric weight (for example 60 or 100 gsm, as in our catalogue) written into the quote prevents a later argument over thick or thin.
How Are Stitching Strength, Welding and Handle Attachment Assessed?
On a stitched bag the line should run evenly; you should not see skipped stitches, loose thread or ends not secured at the start and finish points. On an ultrasonic-welded bag, what to look for is that the edge line is unbroken and shows no sign of opening at the ends. The methods differ, but what is sought is common: continuity along the line.
The handle attachment is the point where the load collects. The area where the handle is fixed to the fabric is the place most open to tearing and coming away; look at the width of the attachment area and whether it is reinforced. The test you can do in the field is simple: fill the bag with your own typical load, lift it by the handles, move it around a few times, then examine the attachment points. This is not a laboratory test; the aim is to see whether the bag is enough for your use.
How Are Size Tolerance and Print Checked?
In series production two bags do not come out identical to the millimetre; so for size you need to say "about this much, within this tolerance" rather than "exactly this much". Because there is no single value that applies to every bag, the tolerance is set in writing when the order is placed. Among the products in our catalogue that list a size, 50x40 and 30x40 are the most common; the tolerance for your size is confirmed in the quote.
Checking print has two stages. Before printing, the logo file, size, position and number of colours are approved; after printing, the first bags are checked against the approved sample: is the logo centred, in two-sided printing are both faces in the right place, is the colour faded or smeared? Make the colour comparison against the approved sample, not the image on a screen.
Acceptance Check Table at Delivery
The table below sets side by side the check you can do at the moment of delivery and the item you can write into the order specification. You do not need to open the whole batch; it is enough to pick a few bags from different cartons and check them in the same order. That way, if a problem arises, it is also clear which item you are relying on.
Checkpoints and what to write in the specification
| Checkpoint | How to check at delivery | What to write in the specification |
|---|---|---|
| Size | Measure width, height and gusset on a flat surface and compare with the approved sample | Size (width x height x gusset, cm) and the accepted tolerance |
| Fabric and fabric weight | Look at differences in thickness, colour and texture side by side with the approved sample | Fabric type, target fabric weight, colour |
| Stitching or welding | Look along the line for continuity and any sign of opening or loosening | Joining method: stitched or ultrasonic-welded |
| Handle attachment | Lift a loaded bag by the handles and examine the attachment points | Handle type, width, attachment style |
| Look at position, colour, sharpness and alignment in two-sided printing | Printing method, number of colours, sides, approved design | |
| Packing and quantity | Check the carton label, the quantity and any crushing or soiling | Quantity per carton and labelling format |
What Samples and Tests Can Be Requested from the Manufacturer?
It makes things easier to divide what can be requested into two groups: checks done by eye and by hand (approved sample, size, print position) and measurements done in an independent laboratory (such as fabric weight, tensile or tear strength, colour fastness). The first group can be discussed in every order; the second brings extra cost and time, so it is requested only for jobs where it is really needed.
As Karaca Çanta we do not claim to provide a laboratory report or a certificate of conformity to a standard. Pass on your sample request during the quote; whether a sample is given and on what terms is confirmed at that stage. If you need a report, write its scope (which property, which method, how many bags) in your quote message so that the expectation is visible from the start.
Frequently Asked Questions
How Is Size Tolerance Set in Bulk Production?
Size tolerance is set in writing by the parties when the order is placed; there is no single value that applies to all bags. First settle the bag's width x height x gusset size in centimetres, then add the deviation you will accept to the quote message. At delivery it is enough to measure a few bags from the batch and compare them with the approved sample.
Is It Possible to Check Fabric Weight at Home?
For an exact value you need to weigh a piece of fabric of known area on a precision scale and convert it to a square metre; because this involves cutting the bag, most buyers do not do it. The practical way is to place the delivered bag next to the approved sample and compare thickness, fullness and sparseness when held up to the light. If in doubt, you can have it measured by an independent laboratory.
How Is Handle Durability Tested?
A simple test that can be done in the field is to fill the bag with your own typical load, lift it by the handles, move it around and examine the attachment points. This is not a laboratory test; it only shows suitability for your use. If you want an independent test for a critical use, write its scope at the quote stage.
Can Samples and Tests Be Requested from the Manufacturer?
You can pass on your sample request during the quote; whether a sample is given and on what terms is confirmed at that stage. A laboratory report, on the other hand, is not defined as a service offered by Karaca Çanta; if you write the scope of the test you need, whether it is possible is assessed in the quote.
