 This applicator allows the sag resistance of coating to be visually evaluated. It applies a series of 10 parallel tracks of the coating to the substrate. Each adjacent track is thicker than the last. This test panel is then held vertically. The sag index value is determined as being the first track which does not sag into the one below (with the thickest at the bottom). The step interval between each track indicates a sag of 25%.
Now conforming to new International Standard BS / ISO 16862
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1108/275 |
90mm film width, step range 50-275µm in 25µm steps. |
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1108/475 |
90mm film width, step range 250-475µm in 25µm steps. |
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1108/675 |
90mm film width, step range 450-675µm in 25µm steps. |
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