Learn what the tool contributes to the mark.
Good technique can still look inconsistent when the paper feathers, the nib catches fibres or the ink flow changes. Materials Notes teaches learners to separate those variables.
Nib flexibility tests
Write the same short series with two nibs and record how much pressure is needed for the same line width. The aim is to feel difference, not rank one nib as universally better.
Paper surface tests
Compare feathering, drag and drying behaviour on two papers using the same nib and ink. Record whether the material changes hairline quality or causes the nib to catch.
Ink-flow notes
Observe how long the nib writes before dipping, where pooling occurs and whether a change in consistency affects fine strokes.
Keep a controlled log
Change one variable at a time. A useful materials log records the paper, nib, ink, dilution if any, and the specific problem being tested.