iron or tin material

P. L. Simmonds (author)

• gallic acid acts_on iron or tin known
  assertsneutralsource: pg57340

  a principle which has the property of acting on iron or tin,

  judge verdicts (2)

  • groundedness 1.00 pass — The passage directly states that coffee contains gallic acid, which acts on iron or tin, leading to dissolution of metal particles affecting taste and color.
  • qualifier_fidelity 1.00 pass — All qualifiers are faithful to the passage.