ISO standards prescribe that the number of cuts shall be 6, and that the cut in each direction must be according to the film thickness and type of coating used as shown below:
1 mm space for hard substrates (metal) 0 - 60 μm
2 mm space for soft substrates (plastic) 0 - 60 μm
2 mm space for hard or soft substrates 61 - 120 μm
3 mm space for hard or soft substrate 121 - 250 μm
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