Colorite Standard
ColoRite Standard is a Paint system comprising hot-dip galvanized steel sheet with a minimum Zinc coating mass of 180 gsm (G60) that is painted on and oven cured with premium polyester in combination with a custom-formulated primer. This produces a nominal paint dry film thickness of 25 microns on the top surface (inclusive of primer) and 10 microns on the bottom (inclusive of primer). ColoRite Standard was developed to provide a durable material for exterior applications with good weatherability and formability.
Anti-Weathering Limited Warranty: 7 Years (UNICOIL Technical terms and conditions applicable).
Substrate
Galvanized steel, minimum G60(180 GSM).
Standards & Grades
| Standard | Description | Sub-Strate Standard | Grades |
| SASO ASTM A755/ A755M | Standard Specification for Steel Sheet, Metallic Coated by the Hot-Dip Process and Pre-painted by the Coil-Coating Process for Exterior Exposed Building Products | SASO ASTM A653/A653M | CS-Type A, B, C
FS Type A, B SS33, SS37, SS40, SS50, SS55, SS60 & SS80 |
| ASTM A755/ A755M | Standard Specification for Steel Sheet, Metallic Coated by the Hot-Dip Process and Pre-painted by the Coil-Coating Process for Exterior Exposed Building Products. | ASTM A653/A653M, ASTM A792/A792M
Aluminum Flat coils |
|
| EN10169 | Continuously organic coated (coil coated) steel flat products — Technical delivery conditions | EN 10346 | DX51D. DX52D
S220GD, S250GD, S280GD, S320GD, S350GD, S390GD, S420GD & S550GD |
| JIS G3312 | Pre-Painted Hot Dip Zinc Coated Steel Sheet and Strip | JIS G3302 | SGCC, SGCD1
SGC340, SGC400, SGC440 & SGC570 |
| AS 2728 | Prefinished/pre-painted sheet metal products for interior/exterior building.
applications—Performance requirement |
AS 1397 | S250, S300, S350, S450, S550 |
Typical Uses
Roofing and Walling, Sandwich Panels, Garage Doors, K-Span, Shutter Doors etc.
Dimensions: (For normal supply products)
| Thickness* (mm) (TCT-P) | Width** (mm) | Zinc coating (GSM) |
| From 0.35 to 1.20 | 700 to 1300 | Minimum 180 (G60) |
* For grade SS50, minimum thickness is 0.46 mm
** For width less than 700 mm are supplied with slit edge
For specific dimensions please contact Sales and Marketing Dept.
TCT-P – Total Coated Thickness with Paint Film (Steel thickness + Zinc coating thickness + Paint thickness)
| Pretreatment | Corrosion resistance proprietary conversion coating each side |
| Primer Coat | Universal Corrosion inhibitive Primer Nominal thickness- 5 microns each side |
| Finish Coat | Polyester based Custom formulated system. Nominal thickness-20 microns on the top or weather side. The finish coat is available in all RAL standard colors and other colors may be available on request. |
| Backing Coat | Foam compatible epoxy coat or Polyester based custom formulated off white Nominal thickness: 5-7 µm. Back coat can be in the same topcoat color and DFT as required. |
| Gloss (60˚) | Medium Gloss, Other gloss levels may be available on request |
Guaranteed Paint Properties
| Test | Test Method | Description | Results |
| Hardness (Pencil) | ASTM D 3363 | Pencil | F or harder |
| Adhesion -T bend | ASTM D 4145 | T-bend | 3T or less (No Pickoff) |
| Flexibility | ASTM D 4145 | T-bend | 3T or less (no cracking) |
| Adhesion – Reverse impact | ASTM D 2794 | Reverse impact | > 9 joules |
| Cross Hatch | ASTM D 3359 | Cross hatch | > No paint removal |
| Gloss 60˚ (%) | ASTM D 523 | Gloss | 30±5% |
| Color Difference | ASTM D2244 | Light colors | Δ E : ≤1.0 |
| Medium Colors | Δ E :≤ 1.5 | ||
| Dark Colors | Δ E : ≤2.0 / Visual match | ||
| Metallics | Visual match |
Expected Product Service Performance
| Property | Test Method | Description | Results |
| Resistance to UV (QUV-A) ASTM G53 | Exposure Hours | 1000 Hrs | |
| ASTM D2244 | Color Change | DE Hunterlab – Light color ≤4 Int.Color ≤6 Dark color ≤8 |
|
| ASTM D4214 | Chalking | ASTM Rating 4 – 2 | |
| ASTM D523 | % Gloss Retention | ≥ 40 | |
| Natural well washed exposure ASTM G7 | Exposure Hours | 5 Yrs | |
| ASTM D2244 | Color Change (Non Vertical) | DE Hunterlab – Light color ≤6 Int.Color ≤9 Dark color ≤12 |
|
| ASTM D4214 | Chalking | ASTM Rating 4 – 2 | |
| ASTM D523 | % Gloss Retention | ≥ 30 | |
| Resistance to corrosion (Salt Spray) ASTM B117 | Exposure Hours | 500 Hrs | |
| ASTM D714 & ASTM D1654 | Blister Density, Size & Corrosion Creep | Blister density- Few, Blister size rating ≥8 Undercut from scribe ≤2mm | |
| Resistance to humidity at 38± 1°C ASTM D 2247 | Exposure Hours | 1000 Hrs | |
| ASTM D714 | Blister Density & Size | Blister density- Few, Blister size rating ≥8 | |
| Resistance to Abrasion | |||
| ISO 1518 | Scratch | ≥ 2000gms | |
| Resistane to Heat (EN 13523-13) | ASTM D2244 | 90°C – 700 hours or 60°C – 1000 Hours | ΔE ≤ 5 , ΔGloss ≤ 7% |
| Resistance to Fire | BS 476 Part 7 | Fire rating | Class M1 |
