| Defects | Cause | Solutions |
| 1.The depth of the formed blisters is not deep enough. | 1.The depth of forming is not correct. | 1.Adjust the Adjustable Nut (13, 15) of cold forming mechanism downwards, using the Vernier Caliper to measure the formed blister depth, make it deeper 0.3-0.5mm than medicine’s thickness. |
| 2.The formed blisters depth is not uniform. | 1.The Forming Up Mould and Forming Low Mould are not parallel. | 1.Using the Vernier Caliper to measure the 4 sides’ distance between the lower surface of the Forming Up Mould (17) and upper surface of Forming Low Mould (18), the difference should be less than 0.1mm. |
| 3.The formed blisters are breached. | 1.Forming depth is too deep. 2.Aluminum foil elongation property is not enough. | 1.Reduce forming depth 2.Change aluminum foil which should have enough elongation property. |
| 4. Wrinkles on the surface of the formed blisters. | 1.Forming depth is too deep. 2.The pressure is not enough high between the Press Plate Mould and Forming Low Mould. | 1.Reduce the forming depth 2.Lower the position of the low and up Adjustable Nut (11), make larger pressure between Press Plate Mould (12) and Forming Low Mould (18). |