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Brand Name : | BOARDWAY |
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Product description
Length | 1830mm, 2440mm, 3050mm | ||
Width | 1220mm | 1530mm | 2050mm |
Thickness | 2-40mm | 2-30 | 2-20mm |
Density | 1.2g/cm3; | ||
Surface | Glossy, and textured | ||
Color | Transparent/crystal or coloured sheet, any color is available |
Range (based on thickness) | Maximum Allowance | Range (based on thickness) | Maximum Allowance |
2~3mm | 0.3mm | 18mm | 0.9mm |
4~8mm | 0.4mm | 20~25mm | 1mm |
10mm | 0.5mm | 26~30mm | 1.4mm |
12mm | 0.6mm | 31~35mm | 1.8mm |
15mm | 0.8mm | 35~40mm | 1.8mm |
Number | Number of Defects | Criterion (Grade A) | |
1 | Foreign Material, Color Impurity | Within 0.5~2mm | Less than 2 defects are allowed. |
Less than 0.5~2mm | Few and sporadic | ||
2 | Surface Scratch | Scratch which can not be felt by touch | Less than 2 defects are allowed. |
Scratch which can not be felt by touch | Defect is not allowed | ||
3 | Rain Grain | Less than 50 x 50mm | 1 defect is allowed |
Less than 100 x 100mm | Defect is not allowed | ||
Less than 200 x 200mm | Defect is not allowed | ||
4 | Water Infiltration, Water Mark | Few and sporadic | |
5 | Crack | Defect is not allowed | |
6 | Craze | Defect is not allowed | |
7 | Air Bubble, Water Stain(The diameter is no more than 3mm) | Few and sporadic | |
8 | Borosilicate Glass Mark | Defect is not allowed | |
9 | Water Elimination | Defect is not allowed | |
10 | Surface Borosilicate Glass | Defect is not allowed | |
11 | Small surface protrusion | Less than 2 defects are allowed. | |
Notes: | 1. The surface defect allowance is for each sheet. | ||
2. For sheets without edge cutting, defects within 20mm from the edge can be ignored. | |||
3. For grade A sheet, total number of defects should not exceed 2. | |||
4. Inspection Method: Put a light behind the sheet and inspect by vertically looking at the sheet from 60cm away. |
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