2K acrylic (acrylic-polyurethane, aliphatic isocyanate hardener AC40); solvent-borne CQS patina
Oak kitchen fronts with a decapé (limed-pore) effect — acrylic system
- Substrate
- Solid oak or oak veneer kitchen fronts, including routed panels with exposed MDF
- Result
- A coloured (RAL/NCS) matt enamel finish with open pores: the oak pores are picked out in white (decapé), the profile is accented with patina, and a non-yellowing clear lacquer goes on top.
- 01
Sand the flat surfaces
Abrasive: P150, P180, P220
Work up P150 → P180 → P220 with the grain, then de-nib and dust off. For decapé the oak pores must stay open and clean — blow them out with compressed air after sanding.
- 02
Sand the profiles
Abrasive: K60, K80
Routed edges and profiles with flexible K60 then K80 pads, so the arrises keep their shape.
- 03
Prime (white open-pore primer)
APS20 100 %AC40 20 % (Hardener)S50 40 % (Thinner)
- Nozzle
- 1.7–1.9 (1.8 optimum)recommended
- Pressure
- HVLP: 2.0–2.5 bar inlet (trigger pulled), ≤0.7 bar at the cap; gravity cup or 0.8–1.2 bar fluid on a potrecommended
- Consumption
- 150official
One full wet coat. On oak the 40 % cut from the schedule lets the white pigment fill the pores; on exposed MDF edges the primer doesn't sink in.
- 04
Dry
Drying: 30–35 °C, 1.5 h
Forced drying in a warm booth. At 20 °C: touch-dry 20 min, sandable after roughly 3–4 h.
- 05
Sand the primer (flats)
Abrasive: P240, P280, P320
Knock down raised grain and level without cutting through to bare wood on the edges. Dust off.
- 06
Sand the primer (profiles)
Abrasive: K120
Profiles with a K120 pad.
- 07
Apply the enamel (tinted to RAL/NCS)
APL20 100 %AC40 20 % (Hardener)S50 30 % (Thinner)
- Nozzle
- 1.7–1.8recommended
- Pressure
- HVLP: 2.0–2.5 bar inlet, ≤0.7 bar at the cap; 0.8–1.2 bar fluid on a potrecommended
- Consumption
- 150official
The enamel goes on as a thin coat and doesn't bury the pores, so the white primer still reads in the grain — that's the decapé look.
- 08
Dry
Drying: 30–35 °C, 1.5 h
The enamel isn't sanded before the patina — the schedule goes straight to patina after drying.
- 09
Apply the patina
CQS 100 %S10 100 % (Thinner)
- Nozzle
- 1.0–1.3recommended
- Pressure
- HVLP: 1.5–2.0 bar inlet, ≤0.7 bar at the cap; gravity cuprecommended
- Consumption
- 80–100official
A light, even coat so the patina gets into the pores and the recesses of the profile.
Mix for this step
Mix calculator
gRatio 100 : 100.0
Component Weigh out CQSpart A 250 g S10Thinner 250 g Total 500 g Covers roughly 0.01 m² at 80,100 g/m².
- 10
Flash off the patina
Drying: 20–25 °C, 5 min
Don't leave it too long: over-dried patina is harder to wipe back.
- 11
Wipe back the excess patina
Abrasive: Scotch-Brite 07448 (S UFN, ultra fine)
Rub the patina off the flats, leaving it in the pores and recesses. For a white decapé the pores stay white. Dust off before lacquering.
- 12
Apply the clear topcoat
ATL20 100 %AC40 20 % (Hardener)S50 40 % (Thinner)
- Nozzle
- 1.3–1.5recommended
- Pressure
- HVLP: 2.0–2.2 bar inlet, ≤0.7 bar at the cap; 0.5–1.0 bar fluid on a potrecommended
- Consumption
- 150official
Make the first pass light and fairly dry so you don't drag the patina, then lay a full wet coat. The lacquer locks the patina in — without it the patina rubs off.
- 13
Dry
Drying: 30–35 °C, 1.5 h
After forced drying the parts can be stacked. Full dry (before packing or testing) is 8 h at 20 °C per the dealer; give the finish a few days to reach full chemical resistance before installation.
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Answers are based on this finishing schedule and its products.
System characteristics
- Vocabulary source
- terms follow t-color.ru 'Main characteristics of coatings'official
- System type
- Two-pack acrylic (acrylic-PU with aliphatic AC40 hardener) open-pore finish on oak: white primer in the pores, coloured enamel, patina, clear topcoat.official
- Dry film build (µm)
- ≈90–110 µm total (primer ≈40, enamel ≈40, lacquer ≈30, patina negligible), minus what the P240–P320 sanding removesrecommended
- Dry film (g/m²)
- ≈152 g/m² before sandingrecommended
- Total wet consumption (g/m²)
- 530–550 g/m² of ready-mixed material (150 + 150 + 80–100 + 150)official
- Gloss
- 20 ± 3 GU (ATL20 M)dealer
- Hardness
- not published as a number (no pencil ASTM D3363 or pendulum ISO 1522 value)recommended
- Elasticity
- high — film follows oak movement in kitchen humidity/temperature swingscatalog
- Wear resistance
- good; >15 years service life claimed for ATL20dealer
- Chemical resistance
- high physical-chemical resistance; recommended for kitchen and bathroom furniture (water, alcohol, coffee tests per the characteristics page)official
- Light resistance
- very good — non-yellowing; all three film coats are cured with aliphatic AC40, the top of Technocolor's yellowing-resistance scale. Important for a white decapé where yellowing would show.catalog
- Hiding power
- high (APL20 enamel and APS20 white primer) — enamel hides the oak colour, grain is shown only by the poresofficial
- Adhesion
- intercoat adhesion within one acrylic system; patina must be fully wiped back on the flats so the lacquer bonds to sanded enamel (no figure published; DIN 53151 cross-cut method)recommended
- Pot life
- 5 h (APS20), 6 h (APL20, ATL20) at 20 °Cdealer
- Drying
- forced 30–35 °C × 1.5 h per coat (official); at 20 °C touch-dry 20 min, full dry 8 h (dealer)official
- Interior or exterior
- interior onlydealer
- Texture
- Open pore — you can feel the oak grain under the hand.recommended
- Coats
- 4
- Coats detail
- APS20 primer + APL20 enamel + CQS patina + ATL20 lacquer (3 film-forming coats + 1 patina glaze)
- Min cycle time (h)
- 4.6
- Min cycle time: why
- Drying only: 3 × 1.5 h forced (30–35 °C) + 5 min patina flash = 4.58 h; sanding, mixing and wiping time not included. At 20 °C without a warm booth expect roughly a working day plus overnight full dry (8 h).
- Full dry (h)
- 8dealer