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AcrylicLacquerGloss: 30 ± 3 GU

ATL50 SM

ATL50 SM thixotropic acrylic lacquer, semi-matt (30 gloss)

Two-pack thixotropic acrylic lacquer (acrylic-polyurethane cured with the aliphatic AC40 hardener). Sag-resistant, very clear, lightfast, flows out well on flat panels; high physical and chemical resistance and non-yellowing with age. Ideal for complex shapes, chairs and balusters.

  • finishing any wood species and MDF
  • kitchen and bathroom furniture
  • vertical work: chairs, balusters, assembled furniture
  • complex-shaped parts
  • open-pore finishes on ring-porous timber (oak, ash)
  • clear topcoat over white and light-coloured enamels
  • clear coat over special effects (pearlescent enamels, metallic patinas)
  • interior use only

Mix calculator

g
Hardener15.0 %

When: Standard range per the official page and catalog.

Thinner35.0 %

When: S50 = normal evaporation, the default and for verticals; S80 = slow, above ~25 °C and on large flat panels.

Ratio 100 : 15.0 : 35.0

ComponentWeigh out
ATL50 SMpart A333 g
AC40Hardener50.0 g
S50 / S80Thinner117 g
Total500 g

Covers roughly 3.33 m² at 150 g/m².

Pot life of the mix: 6.

Ask about ATL50 SM

Answers are based on the ATL50 SM data and the products it mixes with.

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Mixing matrix

  • AC40Hardener
    % by weight: 10–20 %official% by volume: 10–20 %official

    Standard range per the official page and catalog.

    AC40 is aliphatic and non-yellowing. More hardener gives a harder, more resistant film but shorter pot life.

  • AC40Hardener
    % by weight: 20 %dealer% by volume: 20 %dealer

    Technocolor dealer shop recipe (fixed 20 %).

    Top of the official 10-20 % range.

  • AC40Hardener
    % by weight: 10–20 %catalog

    2025-2026 catalog, one line for all gloss variants.

  • S50 / S80Thinner
    % by weight: 30–40 %official% by volume: 30–45 %official

    S50 = normal evaporation, the default and for verticals; S80 = slow, above ~25 °C and on large flat panels.

    S80 improves flow-out but means more dust pick-up and sag risk. Neither thinner changes cure time.

  • S80 / S50Thinner
    % by weight: 30–40 %dealer% by volume: 35–45 %dealer

    Dealer shop recipe.

  • S50 / S80Thinner
    % by weight: 30–40 %catalog

    2025-2026 catalog.

Percentages are per 100 parts of component A.

Characteristics

Solids
29 ± 1 %dealer
Viscosity
55 ± 3 sdealer
Pot life
6dealer
Drying · Touch-dry
20dealer
Drying · Full cure
8dealer
Drying · Conditions
20 °C
Drying · Sand or stack
12–72 (typ. 24) hrecommended
Gloss
30 ± 3 GUdealer
Thixotropy
yesofficial
Lightfastness
high; non-yellowing over timeofficial
Chemical resistance
high physical-chemical resistance; suitable for kitchens and bathroomsofficial
Density
0.95–1 kg/lrecommended
Hardness
medium; tough rather than glass-hardrecommended
Elasticity
elastic end of hardener scale (AC40)catalog

Application

HVLP

Spray viscosity
18-22 s DIN4 (≈ VZ-4)recommended
Consumption
150 g/m²official
Nozzle
1.4–1.6 (typ. 1.5) mmrecommended
Pressure · air · Inlet pressure
2–2.2 barrecommended
Pressure · air · Cap
≤ 0.7 barrecommended
Coats
1–2 coatsrecommended
Sanding between coats
P320-P400 denib after 12-24 h (see stack_or_sand_h)recommended
Wet film
150–160 µmrecommended
Flash-off
10–20 minrecommended
Recoat · After sanding
12–72 hrecommended

Stir thoroughly before use (the matting agent settles). Do not sand the final coat.

Conventional spray

Nozzle
1.6–1.8 mmrecommended
Pressure · air
3–4 barrecommended
Spray viscosity
18-22 s DIN4 (≈ VZ-4)recommended
Consumption
150 g/m²official

Air spray is the method icon shown in the catalog.

Airmix (air-assisted airless)

Nozzle
0.23–0.28 mmrecommended
Pressure · fluid
10–20 barrecommended
Pressure · air
1–2 barofficial
Spray viscosity
20-30 s DIN4recommended
Consumption
150 g/m²official

Electrostatic

Nozzle
as airmix 09-11 thou or air-spray 1.4-1.6 mmrecommended
Pressure · fluid
10–20 barrecommended

The official methods page recommends electrostatic for chairs and table legs, ATL50's core use. Use the airmix/air-spray settings; check conductivity on the unit (solvent-borne acrylic on S50 is usually fine).

Process and compatibility

Substrate preparation
Apply over a primed surface. Stir thoroughly before use.dealer
Goes over
ATS20 / APL RAL
Sanding
primer (ATS20) P320-P400 after 6 h; denib between lacquer coats as above; never sand the last coatdealer
Temperature and humidity
All data at 20 °C. Above ~25 °C switch to S80.
Don'ts
  • Don't lay it on heavy on flat horizontal panels: thixotropic lacquers flow less, so you get unfilled pores and orange peel (t-color.ru characteristics page).
  • Don't use the mix past its 6 h pot life.
  • Don't sand or polish the final coat (especially G and DM: patchy sheen).
Example schedule
Oak-veneered door: sand MDF P150-P180 → CTU23 stain sprayed both sides, 10 min dry → ATS20, 20 min, flip → ATS20 second side → 6 h dry, sand P320-P400 → ATL50, 3-5 min, flip → ATL50 second side → 12 h dry.dealer

Storage

Packaging
1 l,5 l,25 ldealer

Safety: Solvent-borne two-pack with an isocyanate hardener (AC40): spray in a ventilated booth with an A2/P3 respirator, gloves and goggles; keep away from ignition sources.

Mixed into

AC40

Sources

Value tags: “official”, “dealer”, “catalog”, “schedule” are Technocolor data; “workshop” is from our own datasheets; “recommended” is our engineering estimate (hover to see the reasoning).

Not covered by the sources
  • shelf life and storage temperature (no TDS/SDS found)
  • density (only derived)
  • pencil/pendulum hardness
  • official recoat/sanding interval
  • catalog solids 31 % vs dealer 29 ± 1 %