Troubleshooting Shallow or Broken Imprints
纹理过浅或局部断裂的排查
标签：纹理过浅, 压力不均, 金属过硬, 实物偏移, 补压法
纹理整体过浅，通常是金属退火不足（太硬）或辊压间隙过大；局部断裂/穿孔则因实物某处过厚（如叶主脉）压穿薄铜。对策：重新充分退火使金属更软，减小辊隙加大压力；对易穿孔区可在金属背面该位置预垫薄纸减荷。压偏则因送入时未对正，需用定位纸板框固定。
Overall shallowness means under-annealed (too hard) metal or too-wide roller gap; local break-through happens when a thick spot (leaf midrib) pierces thin copper. Remedy: anneal fully for softer metal and narrow the gap for more pressure; pad the back under vulnerable areas with thin paper to reduce load. Misalignment comes from off-centre feeding—fix with a locating cardboard frame. ---