════════════════════════════════════════════════════*/ Permit say, the mixture of potassium hexacyanoferrate(III) and phenolphthalein would be the rust indicator. And we use to detect the rusting of the iron nail. And the result is: the tip, head region of the nail surface blue shade; the straight region appears pink colour. Ps.: could you make https://limonottinghamprices12456.oblogation.com/35684139/how-limo-hire-newcastle-upon-tyne-can-save-you-time-stress-and-money