Humidity and Dust Control Before We Print: Why Our Al Quoz Floor Runs a Stadler Form Lukas Pro
Dust can become a print defect and humidity can affect materials and consistency. Why Sun Studio runs the Stadler Form Lukas Pro on its Al Quoz print floor, and what changed when it did.
Most people buy a dehumidifier because a wall is damp or a room smells. We run a 50 litre unit on our print floor in Al Quoz for a different reason: in a print studio the air is part of the process, because dust cures into the ink and moisture gets between the surface and the print. One disclosure first: Sun Studio belongs to the same Dubai group as PRO TECHnology, which distributes Stadler Form in the UAE, so read our view of the machine with that in mind.
Dust that is floating at eleven in the morning is sitting on a panel at midday, and if it lands between cleaning and printing it cures into the ink as a visible speck. Humidity is quieter about it: a film of moisture on a non-porous surface, the kind we meet every day in glass printing, can get between the pre-treatment and the surface, and absorbent materials change dimension as they take it up. Both of those are air problems. Air conditioning influences temperature and humidity, but what it actually holds depends on the system, the outside-air load and how it is run. That is why we watch the humidity reading in the room and do not assume it.
So we run a Stadler Form Lukas Pro, a 50 litre dehumidifier that is also an air purifier, bought from stadlerform.ae. We have since added more units. This is our own experience of running it on a production floor. The capacity, coverage, noise and filter figures on this page are Stadler Form’s published specification, not measurements we made.
The two air problems a print studio actually has
Dubai does not have a mild summer. Al Quoz runs humid for months, and every time a roller door opens the outside comes in. In a workshop that is only a comfort question; in a print studio it is a quality one.
Airborne dust is the first problem. Dust and airborne particles become a print defect if they settle on a cleaned substrate before the ink lands, or on wet ink before it cures. UV ink cures in the same pass it is laid down, so whatever is on the surface at that moment is fixed under the cured film. Reprinting a panel because of one speck costs the material, the machine time and the delivery date.
Humidity is the second. Pre-treatment can change surface chemistry, improve wetting or leave an adhesion-promoting interface, depending on the material and the treatment used, and a microscopic film of condensed moisture can interfere with that. Absorbent substrates behave differently too: wood, canvas, paper and board take up moisture from the air and change dimension, which shows up as registration drift on a long run.
Stable air is not a luxury in that environment. It is inexpensive quality control.
What dust actually does to a print
A particle that lands on a substrate before the ink does is not a smudge you can wipe off afterwards. UV ink cures in the instant it passes the lamp, so whatever was sitting on the surface is now underneath a solid, cross-linked film and part of the job. On a gloss panel it reads as a raised speck with a halo. On a flood of dark colour it is a pale dot. Either way the piece is a reprint, not a repair.
Dust on the other side of the process is worse again. Fine airborne particles settle on a wet ink layer between passes, and on the printhead itself they are a nozzle problem rather than a cosmetic one. A studio that lets particles circulate spends its time on head cleaning and reprints, and both of those are paid for out of the same day.
That is the practical reason a print floor filters its air rather than just cooling it. Air conditioning moves air around a room. It does not remove what is in it.
Keeping substrates clean before they reach the press
Most of the cleanliness battle is won in storage and handling, before anything is switched on. Sheet material stacked flat and open collects dust across its whole face; stood on edge and covered, it collects almost none. Glass and acrylic arrive interleaved or filmed for exactly this reason, and the discipline is to leave that protection on until the moment the piece is going onto the bed.
Fingerprints deserve their own mention because they are invisible until they are permanent. Skin oil is a contaminant with low surface energy, and ink printed over it bonds to the oil rather than to the material. A print can fail a tape test for no reason other than where somebody picked the panel up.
So the sequence at the press is cleaning, then degreasing, then pre-treatment where the substrate needs it, then printing, with as little time and as little handling as possible between the last step and the first pass. A surface that was cleaned an hour ago in a dusty room is not a clean surface. That whole chain is covered properly in what pre-treatment does and why UV print peels without it.
Condensation: the problem that is specific to this climate
Bring a cold sheet of glass out of an air-conditioned store into a humid workshop and moisture condenses on it, in a film thin enough that nobody sees it and thick enough that ink will not bond to it. In a Dubai August that is not an edge case, it is most mornings. It is also the failure that gets blamed on the ink.
The fix is unglamorous: let the material reach the temperature of the room it will be printed in before you clean it, and clean it after it has settled rather than before. Drier room air has a lower dew point, so a cool sheet is less likely to mist over in the first place, which is the second reason a dehumidifier belongs on a print floor rather than in an office.
Chilled and refrigerated items have the same problem permanently rather than temporarily. A bottle that will live in an ice bucket is going to carry condensation for its whole service life, which is a durability question rather than a printing one, and it is answered in how printed bottles hold up to washing and chilled use.
Why the room matters to the person standing in it
There is a commercial argument as well as a technical one. Clients come to the studio: samples get approved in the room, machines get demonstrated, and manufacturers evaluating equipment stand next to it while it runs. A production floor that is humid, dusty and loud tells a visitor something about the work before anyone has shown them a printed panel.
It matters to the people who work there for eight hours as well, which is the part that tends to go unsaid. Humid air at 24 degrees feels heavier than dry air at the same reading, and a machine loud enough to talk over is a machine that gets switched off. Equipment that only works when nobody minds it running is equipment that does not run.
The other half is what the team breathes. The dust that deliveries bring into our warehouse is handled by MedicAir Pro Max air purifiers, which we explain in the air our team breathes.
Why the Lukas Pro, and what 50 litres a day actually means
Stadler Form rates the Lukas Pro at up to 50 litres of moisture a day and for rooms up to 175 square metres. That rating is the reason we chose it: a production hall is one large open volume, and a domestic unit rated for a bedroom could not keep up with it on our floor. One machine covering the floor is easier to live with than four small ones in corners.
The tank holds 5.2 litres by the maker’s figure, and the unit takes a drainage hose for continuous operation so nobody has to think about it at all. On a working floor, the second option is the one you end up using.
Stadler Form is a Swiss brand, and the unit is designed to be seen. That matters more than it sounds: a studio that shows clients around does not want an industrial box in the corner of the room.
Stadler Form lists these features for the unit:
- Up to 50 litres of moisture removed per day
- Rated for rooms up to 175 m²
- 5.2 litre tank, or a hose for continuous drainage
- Digital hygrostat, timer, multiple fan speeds and swing air distribution
- Wi-Fi control and air quality monitoring from a phone
- Automatic shut-off when the tank is full
We tried other machines first
This was not our first dehumidifier. We worked through several units before the Lukas Pro, and each of them fell short for us on the same three things.
The first was capacity. Machines sold for a bedroom are rated for a bedroom, and in an open production hall they ran all day without pulling the reading down. We ended up with three and were still losing.
The second was noise. A dehumidifier that roars is a dehumidifier somebody switches off, and a machine that is off does nothing. Ours sits a few metres from operators who are concentrating on registration all day.
The third was service. When a unit needed a part, the answer was a phone number that rang out and a wait measured in weeks. For equipment that runs every working day, that is the specification nobody puts on the box and everybody discovers later.
The Stadler Form Lukas Pro is the first unit that dealt with all three for us: a maker’s rating of 50 litres a day and 38 dB in Night Mode, and a supplier who, in our case, answers the same day. That supplier is a sister company, as disclosed above. That is why we stopped looking and started adding units instead.
The part we did not expect: it is an air purifier too
The Lukas Pro is a 2-in-1. Alongside the dehumidifier it runs HEPA filtration, an H11 filter in Stadler Form's own specification, which the manufacturer says captures dust, pollen, allergens, fine airborne particles and bacteria.
That is the feature we would have under-valued on paper and now rate highest. Less dust in the air should mean less dust settling on a cleaned substrate and fewer specks cured into a finish. We have not counted reprints before and after, so take that as our impression and not as a measurement.
One thing it is not, and we want to be exact about this: a HEPA filter handles airborne particles. It is not a control for solvent vapour or the chemistry in UV inks, primers, cleaners and adhesion promoters. What governs that is the safety data sheet for the specific product, the ventilation and extraction in the room, the handling procedure and the protective equipment the SDS calls for. Dust control and moisture control are what this machine does well; they sit alongside those requirements rather than replacing any of them. If you are working out what capacity a given room needs, we compared the range in which dehumidifier suits a UAE room.
The staff noticed first. The air in the studio feels cleaner to work in through a full shift, and that is not a small thing in a building where machines run all day.
Quiet enough to sit next to people all day
High-capacity dehumidifiers have a reputation for noise, and it is usually deserved. Stadler Form states 38 dB for the Lukas Pro in Night Mode. We have not metered it, but on our floor it sits in an occupied room without anyone raising their voice over it.
On a floor where operators are concentrating on setup and registration all day, that is the difference between a machine that stays on and a machine that gets switched off.
What it did to how the room feels
Comfort is not only temperature. Humid air at 24 degrees feels heavier and warmer than dry air at the same reading, because sweat evaporates more slowly. Take the moisture out and the same thermostat setting feels cooler.
In practice the team finds the studio comfortable at a thermostat setting that used to feel warm. We have not measured the effect on the air conditioning or on energy use, so we make no claim about either.
Five years of warranty, and a service team that turns up
The Stadler Form store for the UAE lists the Lukas Pro with an extended five-year warranty, which for equipment that runs every working day is the specification that matters most after capacity.
The part a spec sheet will not tell you is what happens when something needs attention. When we have needed a spare part or had a question, the team at stadlerform.ae has answered the same day and been on site within a day. They are a sister company, so weigh that, but it is what happened. For a studio working to delivery dates, a supplier who responds like that is worth as much as the hardware.
Where we buy them, and why we keep adding units
We buy from stadlerform.ae, which is the Stadler Form store for the UAE, run out of Business Bay in Dubai by PRO TECHnology, the same group Sun Studio belongs to.
We started with one unit to see whether the difference was real. It was, so we have kept adding them as we have opened up more of the floor.
If you run a workshop, a warehouse, a showroom, a clinic or a villa in this climate, the calculation is the same one we made. Humid air costs you something: in reprints, in equipment, in how a room feels to spend a day in. A 50 litre machine that also filters the air is one way to stop paying it.
Common questions
Why does a printing company need a dehumidifier in Dubai?
Does dust affect UV printing quality?
Why does condensation matter when printing on glass in Dubai?
Does air conditioning keep a print studio clean enough?
Is the Lukas Pro a dehumidifier or an air purifier?
How should substrates be stored before printing?
We did not buy a dehumidifier to be comfortable. We bought one because dust and moisture were quietly costing us prints, and we tried several before we found one that could do the job without shouting about it. The Stadler Form Lukas Pro has helped with both on our floor, it is quiet enough to forget, and the people behind it answer the phone. That is why there is now more than one on our floor, and why we buy them from stadlerform.ae.