8, fine line bends show reason of wave shape breakdown and processing technique:
① carries underexposure on the back, should add a back time of exposure;
② advocate underexposure, should increase advocate time of exposure;
③ dry time is insufficient, want to increase dry time;
④ washs edition water not fresh, change to wash edition water freshly;
⑤ washs edition time to grow too. Adjust wash edition time.
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