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0.28mm thick 1050 aluminum coil for CTP base sheet
The alloys used for aluminum base sheet production in CTP plate production are usually 1050, 1060 aluminum coil, etc. Aluminum coil is usually highly processed aluminum, and the surface is anodized to improve corrosion resistance and prepare for subsequent coating and printing. Aluminum substrates have good flatness, uniform thickness and excellent surface quality to meet the stringent requirements of the printing industry.
Why choose 0.28mm thick aluminum coil?
0.28mm thick aluminum coil, this thickness is common in CTP sheet production. The thickness of the aluminum coil affects the rigidity and durability of the CTP sheet. Thicker aluminum coils can provide better support and stability, allowing the CTP sheet to resist pressure and wear during printing, thereby extending its service life. However, too thick aluminum coils may also increase the weight and cost of the CTP sheet, and may also affect the sheetmaking accuracy and flexibility.
CTP/PS sheet basic standard:
| Alloy series | 1 series |
| Typical alloys | 1050A, 1060, etc |
| Temper | H18 |
| Thickness (mm) | 0.13-0.40 |
| Width (mm) | 650-1420 |
| Length (mm) | C (according to customer requirements) |
| ID (mm) | 305/405/505 (according to customer requirements) |
| Application | positive PS sheet, thermal CTP sheet, photosensitive CTP sheet, UV-CTP sheet, etc. |
Dimension deviation:
Thickness allowable deviation +0.003 (mm)
Width allowable deviation +0.5 (mm)
Sheet length allowable deviation 0~+1 (mm)
(Strip) side curvature <0.2 (mm)
Diagonal allowable deviation <2 (mm)
Surface roughness average Ra: 0.17 ~ 0.21μm.
CTP/PS sheet performance requirements:
| Alloy | Tensile strength (normal temperature) | Tensile strength (baked sheet) | Elongation after fracture |
| 1050A | 185~215MPA | 125~140MPA | >1% |
| 1060 | 200~230MPA | >1% |
Advantages of aluminum coils for CTP printing sheets:
1. Good thermal conductivity and corrosion resistance
2. High precision and stability
3. Lightweight and excellent processing performance
4. Good surface properties
5. Environmental protection and recyclability
6. Long service life
7. High efficiency
8. High cost-effectiveness
CTP aluminum substrate surface quality requirements:
1. Surface cleanliness: The surface of the aluminum coil must be clean and flat, without cracks, corrosion pits/spots, vents, scratches, folds, marks, peeling, pine branch patterns, oil marks and other defects.
2. Defect control: The surface is not allowed to have non-metallic indentation and adhesion, horizontal skin, horizontal stripes and other defects, nor are slight color differences, bright stripes and other problems allowed.
3. Shape requirements: There should be no bulging, ruffles and other phenomena to ensure the flatness and stability of the sheet.
0.28mm thick 1050 aluminum coil for CTP base