Advantages & Disadvantages of Wet Paints...


Advantages
  • Paint can be formulated to meed any color specification for your project.
  • Paint is available in a wide assortment of colors and paint types - Arcylics, Kynar's - 50% & 70% PVDF coatings, Polyesters, Silicone Polyesters.
  • Paint acts as an excellent protectant against the harsh elements that can affect the aluminium substrate.
  • Liquid coatings can be smoother than powder coatings, which exhibit some fine "orange peel" effect.
  • Bright metallic color based on aluminum flake is better in liquid technology.
  • Two-coat formulations containing 50% & 70% kynar provide excellent corrosion resistance.
Disadvantages
  • Paints are typically environmentally unfriendly to both the atmosphere and humans, due to the hazardous VOC's (Volatile Organic Compounds) they contain. Due to that fact, Keymark Corporation operates a state-of-the-art VOC abatement system in our painting process, which eliminates 96% of the hazardous VOC's associated with solvent based paints.
  • Color and finish appearance may vary upon factory application due to differences in spray equipment, line conditions or day-to-day process variations. It is strongly recommended that final color approval be made with actual production line samples or mock-ups, not laboratory prepared panels.
  • Pearlescent mica and metallic flakes reflect and scatter light in random patterns; therefore, exact color uniformity should not be expected. Slight color shifting should also be expected when viewing from varying angles and distances. Equipment considerations affect color and are especially critical with multiple applicators.
  • Wet paint applications use more electricity.
  • More waste is generated during application due to overspray.  
  • Managing Color Expectations For High Performance Metal Coatings

Paint Coating Performance


Acrylic Polyester Silicone Polyester Fluoropolymer
Application Excellent Good - Fair Good Good
Solvent Resistance Good Good Good Excellent
Chemical Resistance Good Good Good Excellent
Corrosion Resistance Good Good Good Excellent
Exterior Durability Fair Fair Good - Fair Excellent
Hardness Good Excellent Good Good - Fair
Adhesion Good Good Good Good
Flexibility Good Good - Fair Good Excellent
Mar Resistance Excellent Good Good Fair
Gloss/Color Retention Fair Fair Good - Fair Excellent

Keymark Offers The Following Quality Paints...


AAMA 2605-20 - 70% Kynar 500
Vendor Type Description
PPG: Duranar 2-coat, exotic or non-exotic
Duranar XL 3-coat, exotics, metallics, requires a clear coat
Duranar Sunstorm 2-coat mica
Coraflon/Megaflon 2-coat, 100% fluoropolymer
Valspar: Fluropon 2-coat, exotic or non-exotic
Fluropon Classic II 2-coat, mica
Fluropon Classic 3-coat, metallic, requires a clear coat
Fluropon Premiere 3-coat, exotic, requires a clear coat
Flurospar 2-coat, low VOC
Flurospar Classic II 2-coat, metallic, low VOC
Akzo Nobel: Trinar 2-coat, non-exotic
Trinar Ultra 2-coat, low VOC
Tri-Escent II 2-coat, mica
Trinar TMC 3-coat, metallic, requires a clear coat
Trinar TEC 3-coat, exotic, requires a clear coat
AAMA 2604-20 - 50% Kynar 500
Vendor Type Description
PPG: Acrynar
Valspar: Acroflur
Acrodize Mica
Nanodize II Organic & inorganic polymers
Akzo Nobel: Alum*A*Star 50 Earth tones
Alum*A*Escent 50 Mica
Ceram-A-Star E Ceramic and inorganic pigments (Not a 50% Kynar product)
AAMA 2603-20 - Baked Enamels
Vendor Type Description
PPG: Duracron/Polycron III/Macroflex Duracron - Acrylic, Polycron III/Macroflex - Polyesters
Valspar: Dynapon/Polylure 1500/Flurocryl Dynapon, Flurocryl - Acrylics, Polylure - Polyester
Akzo Nobel: Acra-Bond Ultra Acrylic
Acra-Bond Ultra-S Bright/Mica, Acrylic
Polydure E High solids polyester

The Wet Painting Process...


Designed for high production environments, the Vertical Extrusion Paint System provides the greatest amount of throughput while minimizing manpower requirements. The automated system moves extrusions vertically through each step in the pretreatment, paint application, and curing processes.


Pretreatment:
  • Stage 1 - Cleaning of extrusions with caustic
  • Stage 2 - Rinse
  • Stage 3 - Application of Chrome Phosphate Conversion Coating
  • Stage 4 - Rinse
  • Stage 5 - Rinse
Paint Application:
  • Stage 1 - Application of paint with (Up to 4) Ransburg Turbo Electro-Static Discs
  • Stage 2 - Flash Off
Curing:
  • Stage 1 - Bake Oven
  • Stage 2 - Cool Down