Antique door knobs should be cleaned according to material and finish. Brass, bronze, plated steel, glass, and porcelain need different care. A stable patina may be part of the original appearance and should not be polished away automatically.
Remove dust with a soft cloth. For metal knobs, use a cloth lightly dampened with water and mild neutral soap, then dry immediately. Do not soak the knob, spindle, rose, or lock body. Avoid bleach, strong acids, wire brushes, and coarse abrasives.
The Canadian Conservation Institute states that polishing is abrasive and recommends starting with the mildest method. Test the cleaner on a hidden area. Stop when plating lifts, color transfers, or corrosion appears powdery.
Cleaning is suitable when the hardware remains structurally sound. Loose spindles, cracked roses, heavy corrosion, or poor latch engagement may require replacement. Project orders should match door thickness, spindle size, rose diameter, latch type, finish, and lock function.
A manufacturer controls forming, machining, polishing, plating, assembly, and testing. A trader depends more on external factories for finish matching and dimensional changes.
Established in 1994, we provide OEM and ODM services with monthly capacity up to 800,000 pairs or sets. The process covers drawing review, finish confirmation, sample approval, production, inspection, and export packing.
Confirm material, finish sample, door preparation, lock compatibility, corrosion requirement, packaging, spare parts, and destination documents. Quality checks should cover dimensions, finish consistency, torque, pull strength, corrosion resistance, and carton protection.
EN 1906:2012 defines requirements and tests for door knobs and lever furniture, including operating performance, durability, strength, safety, and corrosion resistance.
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