Useful product notes explain the conditions under which a material worked, the amount used, its reactions and its limitations.

Record these details

  • Product batch, opening date and appearance.
  • Leather type, base colour and treatment history.
  • Tool, amount, contact time and environment.
  • Immediate results and condition after 24 hours.

Learning sequence

  1. Establish a shared template.
  2. Change only one variable per test.
  3. Record failed trials and stop signals too.
  4. Regularly summarise findings in an internal suitability table.

Personal experience does not replace official product instructions. Stop using a product that has an unusual smell, has separated abnormally or is past its usable date.