Colour is evidence of a sequence, not a shortcut to a formula. Fibre, concentration, oxidation, layering and finishing can all change what reaches the eye.
Read the layer
A pale edge beside a saturated centre may describe exposure, compression or a later bath. The same hue can arrive through different material histories.
- Compare adjacent zones
- Notice the fibre and finish
- Ask which layer came first
Colour is not a safety signal
A beautiful result does not reveal a product's hazards, fastness or disposal requirements. Those decisions belong to the exact product label and current safety data.
- Keep colour and safety separate
- Link the method page
- Do not publish a universal formula
