1. Engraving Methods for House Numbers
Laser Engraving (Most Recommended)
Uses a high-precision laser to carve numbers 0.2–0.5 mm deep into the steel surface. It can handle fine details (e.g., serif fonts, decorative number styles) with a tolerance of ≤ ±0.1 mm.
The engraved grooves create a natural color contrast with the surrounding patina: as the door plate ages, the grooves oxidize slightly slower, forming a subtle darker outline that makes the numbers more distinct over time.
Mechanical Engraving
Uses a CNC router with a carbide bit to cut numbers into the steel. Suitable for deeper engravings (0.5–1 mm) if you want a more pronounced, tactile effect (e.g., for visually impaired users).
Best for bold, simple number fonts-less ideal for intricate designs due to slightly wider groove edges.
2. Advantages of Engraved House Numbers on Weathering Steel
Durability: Engraved numbers are part of the steel surface, so they will never peel, fade, or fall off-unlike stick-on or painted numbers. The service life matches the door plate itself (20–30 years outdoors).
Patina Compatibility: Engraving does not block the formation or self-healing of the protective patina layer. The entire door plate (including the number grooves) develops a uniform rusty texture, maintaining a cohesive, rustic aesthetic.
Visibility: The color contrast between the engraved numbers and the patina improves over time, making the house numbers easy to read even in low light or from a distance.
3. Key Considerations for Best Results
Font & Size Selection: Choose bold, clear fonts (e.g., Arial Bold, Helvetica) with a minimum number height of 5 cm for outdoor door plates-this ensures visibility from the street. Avoid overly thin fonts, as they may blur slightly as the patina matures.
Timing of Engraving: For optimal results, engrave the house numbers after artificial patina acceleration (or after the natural patina has fully matured). This avoids covering the numbers with loose initial rust during the oxidation process.
Sealing (Optional): Apply a thin layer of transparent breathable sealant over the entire door plate after engraving. This slows patina darkening and prevents dust from accumulating in the number grooves, while maintaining the material's natural look.
