Hand-Wiped Tinning Comprehensive Guide

Used in

• Chapter 4 Copper, Wood and Stone

The rows that check it

• 6 confirmed
• 2 amended
• 3 marked for safety

• W4 confirmed Safety Bare copper plus acid (vinegar, wine, tomato, apple, whey) gives verdigris, an emetic; every pan that meets acid is tinned
• W5 confirmed Safety Sal ammoniac at tinning heat gives off ammonia and hydrogen chloride: work outdoors, wind at your back
• W6 amended Safety Tin must be block tin 99.9 % or better, no lead or cadmium; never solder, pewter or roofing sheet; German food law (LFGB) forbids lead and cadmium in tin linings
• W15 amended Copper conducts heat about 2× aluminium, 5× cast iron, 25× stainless
• W24 confirmed Silver brazing alloy about half silver with copper, zinc and a little tin (ISO 17672 Ag 156: 56 Ag, 22 Cu, 17 Zn, 5 Sn); brazing gap 0.05 to 0.10 mm
• W27 confirmed Tinning window: pan a little above 232 °C, about 250 to 280; water drop skates; flux burns and tin goes yellow then purple and beads if too hot; steps if too cold; 0.45 mm lining; …
• W28 confirmed Never quench a freshly tinned pan: the tin skin cracks from the copper
• W29 confirmed Re-tin when copper shows in a patch the size of a large coin; grey tin is harmless surface oxide

In the Index

Copper and tin The kitchen and its dishes