Two wipes can share the same fibre, weight and edge finish and still behave differently on the bench, because the fold decides what the operator actually holds. It is the least discussed variable in wiper selection and one of the easiest to standardise.
In the Cleanspec range the difference is visible in the model numbers: W2101 is an X5, W2201 an X6, and W2301 an X7. All three are the same family of knitted cloth. The fold is what separates them.
What the number refers to
The X number describes how many times the sheet is folded before it is stacked or bagged. More folds produce a smaller presented face with more layers under the fingers. Fewer folds expose a wider surface on the first pass.
That single mechanical difference changes four things: how the wipe is picked up, how much uncontaminated surface is available, how much pressure reaches the substrate, and how much of the sheet is wasted when the task is small.
X5: the wide face
An X5 opens to the largest working face of the three. It suits broad, flat surfaces where the operator wants coverage and speed: a bench run, a panel, a large piece of equipment. Solvent evaporates faster across a wide face, so the pass tends to be shorter and more even.
The trade-off is control at the edges. On a small part, most of an X5 sheet never touches the surface, and the unused area is discarded clean. That is waste, and on solvent-wetted tasks it is also unnecessary exposure.
X6 and X7: control at the contact point
An X6 sits between the two: enough face for a mid-sized surface, enough layers to keep the sheet stable when the operator presses. It is the default for general bench wiping in ISO 7 and ISO 8 areas, and the format most operators ask for when a process is being written from scratch.
An X7 presents the smallest face and the most layers. It is the format for precision work: connector bodies, optical mounts, small machined parts, and any surface where the wipe must not drag. The extra layers also keep the sheet from collapsing when a solvent is applied directly to the cloth rather than the surface.
| Format | Presented face | Layers under the hand | Best for | Watch for |
|---|---|---|---|---|
| X5 — W2101 | Widest | Fewest | Benches, panels, large housings | Waste on small parts |
| X6 — W2201 | Medium | Medium | General bench and equipment wiping | Compromise on both extremes |
| X7 — W2301 | Smallest | Most | Connectors, optics, precision parts | More passes on large surfaces |
What changes on the line
Dispensing. A tighter fold holds its shape in a bag or dispenser and is easier to take one-handed. If operators work with a solvent bottle in the other hand, this matters more than the fibre.
Contamination at the edge. The outer fold is the part that touches the bench, the glove and the bag. A smaller presented face means less of the sheet is exposed to the environment before use.
Solvent control. A wide face releases solvent over a larger area and evaporates faster. A narrow face keeps the solvent concentrated, which is useful for a spot clean and unhelpful for a flood clean.
Waste. The cost of a wipe is not the price per sheet; it is the price per square metre actually used. On small parts, an X7 can use less than half the material of an X5 for the same task.
Standardise one fold per task, not one fold per site. A line that uses X5 for panels and X7 for connectors will consume less and produce more consistent cleaning than a line that uses whichever bag is open.
Three checks before you switch
First, count the sheets used per task for a week. The number is usually higher than the specification assumes. Second, watch where the wipe is held: if operators bunch an X5 to make a small pad, they are asking for an X7. Third, test the solvent dose on the new format. A tighter fold holds more liquid in the centre and wets the surface differently.
If the task involves a validated cleaning procedure, changing the fold is a change to the procedure and should be recorded as one, even when the fibre and weight are unchanged.
Does fold format affect particle release?
Not directly. Particles come from the fibre, the edge finish and the way the sheet is handled. The fold changes how much of the sheet is exposed and how much pressure is applied, which can change the number of particles liberated during a pass.
Can I use an X7 for large surfaces?
You can, but you will use more sheets and more passes. For a surface wider than about a forearm, an X5 or X6 is faster and produces a more even solvent film.
Is a higher fold more expensive?
Per sheet, usually yes, because there is more converting labour. Per clean square metre it can be cheaper, because less of the sheet is discarded unused. Compare consumption per task, not price per bag.
If you are rewriting a bench procedure, send the surface, the solvent and the part size. We will recommend one format and one fallback, and send both for a trial.
