A deep matt lacquer, measured at around 5-8 GU at 60 degrees, holds fingerprints more than a 25 GU satin does. It sounds like a contradiction, but it’s micro-roughness: the silica particles and waxes that kill the reflection create a porous surface, skin oils settle into it, and housekeeping can only remove them by rubbing. For bedrooms, the sensible range sits between 15 and 30 GU. Gloss makes sense in a handful of specific spots, and it should be chosen knowing it costs twice as much and can’t be touched up.
Contents
Gloss is a number, and it belongs in the specification
Gloss is measured with a reflectometer under ISO 2813, the same thing as ASTM D523 for the American market. The instrument fires a beam of light at the surface at a set angle and reads how much comes back in the specular direction, with a polished black reference glass taken as 100 GU. The standard angle is 60 degrees. If the reading exceeds 70 GU it’s remeasured at 20 degrees, where the scale discriminates better, and if it drops below 10 the measurement switches to 85 degrees.
Commercial gloss bands aren’t regulated by anyone, they’re an agreement between buyer and seller. That means “matt” written on an order means nothing until it comes with a number and a tolerance attached. The correct wording for a specification reads something like: matt lacquer 20 GU +/- 3, measured at 60 degrees under ISO 2813.
| Band | GU at 60 degrees | How the reflection reads | Fingerprints and marks | Touch-up on site | Typical hotel use |
|---|---|---|---|---|---|
| Deep matt | 2-8 | no defined reflection | very visible | no, polishes from rubbing | wall panelling in low-touch areas |
| Matt | 8-15 | a halo of light with no outline | visible | with difficulty | headboards, panelling |
| Satin | 15-35 | soft reflection, blurred edges | barely visible | yes, with blending | wardrobe doors, chests, desks |
| Semi-gloss | 40-70 | the window’s outline is readable | visible | only on a full piece | trims, mouldings, signature pieces |
| Gloss | 70-90 | a sharp reflected image | very visible | no | bar, reception, showpiece items |
| Mirror gloss | over 90 | a specular image | very visible | no | very few spots, high budget |
Gloss on its own doesn’t tell the whole story. Two surfaces at 85 GU can have completely different sharpness in the reflected image: what finishers call orange peel is haze and distortion, and it’s measured with separate parameters like haze and distinctness of image. On a gloss counter, the difference between good and mediocre work sits there, not in the gloss figure.
Why matt finishes polish themselves over time
Matting agents create micro-peaks on the surface that scatter light. Repeated rubbing, whether from a microfibre cloth run over the same spot every day or a suitcase dragged across a front, rounds off those peaks. The area becomes locally more reflective, a shiny patch shows up on the matt finish, and it’s irreversible: polishing it would destroy the very texture that creates the matt effect. In a room, the spots that shine first are the door edge at handle height, the drawer front under the top, and the edge of the writing desk.
Anyone running a room stock with very deep matt lacquers finds this out in year three, and at that point either lives with the shiny patches or redoes the fronts. In high-turnover properties, the sensible choice remains satin between 20 and 30 GU, which forgives a lot and cleans with neutral detergent without leaving marks. The furniture maintenance routine should be written together with the gloss choice, not afterwards, because they’re the same decision seen from two angles.
The finishing cycle: how many coats, how many grams
A serious pigmented polyurethane lacquer starts on an MDF substrate, sanded and dusted, and involves two to three coats of primer, each around 100-200 grams per square metre, typically catalysed at 30%. Between coats, fifty minutes to five hours pass depending on the product and temperature, and at least twelve hours are needed before sanding. Intermediate sanding uses P320-P400 abrasives, while preparation for the final finish goes up to P500-P600. Then two coats of topcoat, 100-150 grams each. The dry film thickness of a complete matt cycle sits roughly between 120 and 200 microns.
Mirror gloss is a different trade altogether. It’s built up in thickness, often with polyester, in six to eight coats, reaching 300-400 microns of film, then sanded dry or wet through P800, P1000, P1500, P2000 up to P3000, and finally polished with cutting compound and polishing paste. Sanding and polishing alone account for half the cost of finishing the piece. That’s why the same door in gloss lacquer costs twice as much as matt, and why furniture production timelines stretch by two or three weeks when a project calls for gloss.
The type of product in the cycle changes the result years down the line. Aromatic polyurethanes are the most common, and on whites they yellow towards cream within a few years, especially where the sun hits. Acrylics hold white much better, which is why they’re used on light colours and bleached woods. UV-cured lacquers, cured under a lamp, have practically zero solvents and a surface hardness no other cycle reaches, but they need flat surfaces, so they’re applied to panels, not shaped pieces. Anyone looking for scratch-resistant finishes on tops and fronts is almost always looking for one of these.
Colour: RAL, NCS and the missing number
The RAL Classic range has 216 colours, RAL Design has 1,825, and the NCS scale has around 1,950. An NCS code like S 1002-Y50R reads as follows: S indicates the standard collection, 10 is the blackness percentage, 02 the chromaticness, Y50R the hue halfway between yellow and red. It’s a system that describes perceived colour, while RAL is a catalogue of physical samples, and the two don’t convert into each other without some discrepancy.
The point that actually causes disputes is different: the same RAL on powder-coated metal and on lacquered MDF isn’t the same colour. Binders, pigments, film thickness and above all gloss all change, and the measured gap often sits between 1 and 3 Delta E. Below 1 the difference is imperceptible, around 2.3 is the threshold where a trained eye starts to notice it, above 3 anyone can see it even without the pieces side by side. When a room combines powder-coated metal handles with lacquered doors in the same code, that’s exactly where the risk sits, and it’s managed by having the two components approved together under the same light. The finish technical sheets need to state the colour code, the reference system, the gloss level and the Delta E tolerance, otherwise they only describe half the problem.
Metamerism completes the picture: two samples identical under daylight can diverge under a room’s warm lamps. This is checked in a light booth with standard illuminants, typically D65 for daylight, A for incandescent and TL84 for commercial fluorescent, and the verdict is given under the light the guest will actually have.
Samples and batches
A sample only has value if it has the same substrate, the same cycle, the same gloss and ideally the same paint batch as the finished piece. A sample lacquered on plywood doesn’t describe how the same lacquer will look on MDF, because the substrate’s absorption differs. The minimum useful size is 30×30 cm, ideally 40×60: below 20 cm the eye can’t correctly judge either the scale of the colour or the reflection, which is why light colours approved on small samples always seem more intense once installed. In the sample room, lacquer should be viewed with the curtains open and with only artificial light, at two different times of day.
Something always shifts between one batch and the next: the pigment batch changes, the booth temperature, nozzle wear, the applied thickness. On light opaque colours, a thinner coat drifts towards the substrate underneath. A reasonable tolerance to write into the furniture specification is Delta E within 1 inside the same batch and within 2 between different batches, with the requirement that all pieces destined for the same room be lacquered in a single production run. A door and its side panel need to come from the same booth run. The booth, incidentally, works well between 19 and 24 degrees with relative humidity between 40 and 60%: above 70% the film condenses, hazing and craters appear, and adhesion suffers.
For adhesion there’s a simple test anyone can request: the cross-cut test under ISO 2409, where a grid is scored and tape applied. Classification runs from 0 to 5, with 0 the best, showing clean edges and no lifting. A lacquer for contract use should sit at 0 or at most 1.
Where gloss makes sense, and where it doesn’t
In bathrooms, steam and hair products attack the film more than in a bedroom, and on the fronts of bathroom furniture, a satin finish holds up better against daily wiping than a deep matt one. On headboards, on the other hand, matt works well, because nobody touches them and raking light from wall lamps flatters them. I’d only recommend gloss in a bedroom on a single, tall element, out of reach of suitcases.
Then there’s safety. Since 2022, the Italian framework for fire reaction of furniture references the Euroclasses of EN 13501-1, with the old classes still appearing in older documents. A lacquer on standard MDF stays in class D, while with a fire-retardant substrate and an intumescent coating it can reach up to B-s1,d0. The classification applies to the tested system, meaning that substrate, at that thickness, with that cycle: changing the colour invalidates nothing, changing the number of coats does. Anyone preparing fire safety documentation for furniture needs to obtain the test report that describes exactly the cycle applied.
On indicative 2026 costs, a bespoke matt lacquer runs between 45 and 60 euros per square metre of finished surface, gloss between 80 and 110, with higher peaks for large-format mirror gloss. On the finished door, matt lacquer adds 15-25% over a melamine-faced panel of the same tier. That difference is recovered when the piece can be touched up rather than replaced, and that only happens if the gloss level was chosen with whoever runs a cloth over it every morning in mind.
Frequently asked questions
What gloss level is right for a hotel room?
Between 15 and 30 GU measured at 60 degrees. This is the band that hides fingerprints and micro-scratches best, cleans with neutral detergent and stays touch-up friendly by spray if damaged. Below 10 GU the surface tends to polish itself shiny at points of rubbing; above 50 it shows every mark.
Why has the white on the doors turned yellow after three years?
Because the cycle was aromatic polyurethane, which yellows from light exposure and oxidation, more markedly where the sun hits. On exposed fittings, the difference between an open door and a closed one becomes obvious. For whites it’s worth requesting an acrylic or aliphatic cycle from the start.
Can a lacquered piece of furniture be touched up on site at the hotel?
On a satin finish, yes, with spray blending and masking, and the result holds up if the operator is skilled. On gloss, no: the specular reflection demands thickness, flatness and polishing of the entire surface, and overspray always leaves a hazy edge. On damaged gloss, the piece is replaced or entirely redone.
What should the order specify to avoid colour disputes?
The colour code with its reference system, the gloss level with tolerance and measuring angle, the type of cycle, the substrate, and a clause that pieces destined for the same room are lacquered in the same batch. It’s also worth stating the colour tolerance in Delta E and the reference illuminant for verification.
Does lacquer resist scratches better or worse than a melamine finish?
Worse, when it comes to surface scratching: a melamine-faced panel has a very hard surface layer, while a paint film marks more easily. Lacquer, however, can be repaired and melamine can’t, and over a ten-year horizon in a property with ordinary maintenance, that flips the comparison.
