SHAKH by aliakbar babaei from iran

material:
This door handle are made of metal, with the most common type brass. The term brass refers to a group of alloys that contain a combination of varying amounts of copper and zinc.
Though there are several processes used for metal door handle, including casting where a molten metal is poured into a mold, brass door handle are typically forged. Forging can produce products having superior strength, toughness, reliability, and quality (up to 250% stronger than castings).
Surface preparation:
• the door handle goes through a series of finishing steps. Separate coining, milling, drilling, and tapping processes produce a surface ready for the polishing operation. One or more buffing steps are used to achieve a brilliant finish.
Coating:
• These are applied using electroplating or physical vapor deposition (PVD).