A surface looks like wood in one photograph and like a moulded material in another. It is tempting to resolve the uncertainty through confident wording. A better collection note separates what the image shows from what the object record identifies.
Start with a neutral description
Write about visible colour, texture and shape: dark brown, smooth, patterned, curved. These observations can be useful without claiming to identify a substance. “Wood-like grain” describes an appearance; “wood” names a material.
Keep the viewing conditions in mind. You may be looking at a small image, a cropped detail or a surface partly hidden by reflections. State those limits rather than treating the photograph as a complete examination.
Attribute the identification
If a museum record identifies a material, write “the catalogue lists…” and preserve any qualifier. “Possibly” and a question mark are information, not clutter to remove from a summary.
For a hypothetical object, the catalogue might identify a composite while a casual caption calls it plastic. Those labels operate at different levels of detail. Consult the record’s explanation before assuming the terms describe identical evidence.
Do not turn uncertainty into a home test
Historical objects can lose information through casual attempts to scratch, heat, dissolve or polish their surfaces. A reading exercise does not require altering an object. Where identification matters, use the institution’s documentation or seek an appropriately qualified specialist.
In your notes, create three lines: visible appearance, documented identification and unresolved question. This keeps the description useful even when the final answer is unavailable.
Our introduction to nylon’s material history offers broader context, but a general history cannot identify every individual object. The link between a material and a particular example still needs evidence of its own.