Wuhu Iron Picture (Wuhu Tiehua)

Tools you'll need

• Forge or torch (heat source)
• Tongs
• Anvil with a horn
• Small cross-peen hammer
• Ball-peen hammer
• Chasing chisels / light hand chisel
• Wooden forming blocks (and optional lead blocks)
• Spring swages
• Jeweler's saw or hot chisel
• Hammer-jaw pliers
• File
• Clear lacquer or boiled linseed oil (finishing)
• Light-colored wooden backing panel or window frame (mounting)

Build steps

1. Start with 16 to 18 gauge low-carbon sheet metal for the petals and leaves, and 1/4 inch to 3/8 inch round or square mild steel bar for the main branch. Have ready small cross-peen hammers, chasing chisels, wooden forming blocks, spring swages, and a jeweler's saw or hot chisel. Remember: this is not heavy forging. It is precision hammer control, hot chiseling, repoussé, and cold joinery. You are painting with red-hot iron, not bending it.
2. Forge the main branch, which is the frame of the whole picture. Heat the bar stock to a bright orange, then use a cross-peen hammer to draw out uneven tapers and heavy texture along the length. This mimics aged, weathered wood and gives the branch its natural, organic look. Work in the heat - the texture has to be pulled from the bar, not chased cold.
3. Twist and bend the bar over the horn of the anvil to create sharp, angular brushstrokes, the kind you see in Chinese landscape paintings. The bend should be deliberate and clean - it is a stroke, not a hook. Keep the lines bold and intentional; that is what reads as a painted branch rather than a bent rod.
4. Fuller deep ridges along the branch length using a light hand chisel to capture natural bark-line detail. Work in small passes and reheat often so the steel stays workable. These ridges are what make a bar of steel read as a real branch with grain and texture in it.
5. Craft the flowers. Cut individual flower profiles out of the sheet metal, then heat each one with a torch or in the forge and dish it into a small wooden or lead forming block with a ball-peen hammer. The curve you give each petal is what turns a flat cutout into a three-dimensional flower. Keep the dish subtle - too much and the petal balloons, too little and it stays flat.
6. Form the stamens by drawing out 1/16 inch wire ends, or by splitting thin sheet stock with a fine chisel, to make the delicate center filaments. This is the finest work in the whole piece. A light touch and a small chase chisel are all you need - overwork it and the filaments break.
7. Craft the leaves. Fuller a central vein line down each small sheet cutout, then crimp the edges cold using hammer-jaw pliers to simulate natural curling. Alternating a hot fuller pass with a cold crimp gives the leaf both a spine and a realistic curl - the contrast between heat and cold is what makes it look alive.
8. Join the pieces without visible modern welds. Traditional Wuhu pictures do not use them. Instead, drill or hot-punch small blind holes (1/16 inch to 1/8 inch) along the back of the main branch stock. File small tenons onto the stems of the flowers and leaves, insert them into the receiving holes, and hot-rivet or hammer-braze them tightly from behind. The joins must be invisible from the front - that is what keeps the picture looking like a painting, not an assembly.
9. Finish the piece by surface oxidation. Heat the completed assembly to a dark blue-black heat (about 600 F) and apply a light coat of clear lacquer or boiled linseed oil. This protects the iron against rust while darkening it to resemble Chinese calligraphy ink. This is the step that turns raw iron into a finished picture - without it, the piece looks like steel instead of ink.
10. Mount the finished iron sculpture onto a light-colored wooden backing panel, or hold it slightly offset inside a wooden window frame using small, hidden iron pins. A light background is what makes the dark iron read as ink on a page - that contrast is the whole effect of the craft. Once it is mounted, the Wuhu Iron Picture is complete.