What needs to be clarified
Determine the nature of the visible cooking-surface changes, distinguish colour and deposits from metal damage, and compare the findings with the pan’s construction and documented care.
Materials to prepare
- Unpolished pan and photographs of its interior under different lighting
- Material marking and care instructions for this particular model
- Account of heating, ingredients and cleaning products used before the marks appeared
What to compare
Record the boundaries, texture, scratches and pits under magnification. Compare affected and unaffected areas and look for a separate deposit layer. After initial photography, trial-clean an agreed area with a product permitted by the instructions. Assess this alongside surface condition; colour alone cannot establish a previous heating temperature.
Possible outcome of the analysis
A map of changes and an opinion on surface condition may report the local examination, grounds for further material testing and damage hypotheses that remain unconfirmed.
Limits of the conclusions
Removal of colour does not establish alloy composition. Without a heating history, a particular exposure cannot be identified; visual assessment does not replace testing metal properties.