Platinum

Platinum is a chemical element with the chemical symbol Pt and an atomic number of 78. Its name is derived from the Spanish term platina del Pinto, which is literally translated into "little silver of the Pinto River." It is a dense, malleable, ductile, precious, gray-white transition metal. Platinum is used in catalytic converters, laboratory equipment, electrical contacts and electrodes, platinum resistance thermometers, dentistry equipment, and jewelry. Because only a few hundred tonnes are produced annually, it is a scarce material, and is highly valuable and is a major precious metal commodity. Being a heavy metal, it leads to health issues upon exposure to its salts, but due to its corrosion resistance it is not toxic as a metal. Some of its compounds, most notably Cisplatin, are applied in chemotherapy against certain types of cancer.

Cleaning
Soapwort extract 100 gms soapwort root(Saponaria Officinalis)
 * Mechanical
 * Chemical

1 lit water

Mix root and boiling water,after 10 minutes of soaking it is ready to use.Fresh solution is pH neutral,few days old is slightly acidic (pH 5).

According to:

Personal experience


 * Electrochemical
 * Ultrasonic
 * Laser