At the crossroads of every 19th-century settlement stood the blacksmith's shop. The master smith shaped the tools of civilization: wagon wheel tires, plowshares for the soil, horseshoes for transit, and architectural ironwork for hearth and home.
| Visual Heat Color | Approx. Temp (°F) | Metallurgical State | Proper Tool Applications |
|---|---|---|---|
| Faint Straw Yellow | 430° F | High hardness • brittle edge | Straight razors, metal engraving gravers, lancets. |
| Medium Brown Ochre | 490° F | Tough cutting edge | Wood chisels, scissors, cold punches, shear blades. |
| Peacock Purple | 525° F | Impact resistant | Axes, adzes, stone carving chisels, hunting knives. |
| Spring Blue | 575° F | Maximum elasticity • flex | Coil & leaf springs, handsaws, swords, wheel spokes. |
| Bright Cherry Red | 1,450° F | Austenitic forging heat | Hot forging, drawing out tapers, punching eye holes. |