墨入れ

1. Origins, structure, and basic meaning

• Structure: 墨入れ, read すみいれ, is the inking stage in which final lines are drawn over a sketch.
• Basic usage: 墨入れを始める begins the post-sketch process; 輪郭から墨入れを進める starts with the character outline.

2. Common pitfalls and similar expressions

• Beginning the process and choosing its order
  • 始める marks the stage's onset, while から進める identifies the first area worked; the compound does not mean putting ink into a container.