The inlay work in copper and silver from Andhra pradesh is usually digging the field mines.
I think LEPRA currently works in Bihar, Orissa and Andhra Pradesh
Copper is the best conductor of any metal except for silver. Silver is too expensive for normal use.
You can buy a place before you set up a children park in any village and you can start your work there. You no need any permission from government to do that. GOOD LUCK.
The thermal conductivity of copper is higher than that of aluminum, and silver is better than either copper or aluminum.
Copper is probably your best bet for all around. Gold, silver and tin also work well.
Silver is used as a low resistance conductive material. Contactors and relays contact points are made of copper and are silver plated to obtain the lowest resistance between the moving contact faces.
potassium sodium lithium calcium magnesium aluminium (carbon) zinc iron (hydrogen) copper silver gold
Copper has a .39 specific heat capacity which is almost the same as silver, but is 1/6 the cost. Specific heat capacity is a substances ability to hold heat and the smaller value the better. Copper is the 4th best solid to use for cooling systems behind lead, silver, and gold(none of which can be used for expense and/or health reasons.)
Use copper and silver coins, with blotting paper soaked in salt water. Stack the coins:- silver, blotting paper, copper, silver, blotting paper, copper, silver...etc. Attach wires to the lower silver coin and the copper upper coin. Stack the coins so there are at least four pieces of blotting paper soaked in brine. You can prove the battery's potential with a digital multimeter. It will not produce much useful current, but you should be able to get 3 volts out of it. You could get it to work a digital watch. (make sure you get the voltage right first.) You could also try sticking dissimilar metal plates into a lemon. Try copper and steel, but experiment with different metals, see which is best.
Jewellry and silverware are two other traditional uses of silver. Malleability, reflectivity and luster make silver a bueatiful choice. Because it is so soft, silver must be alloyed with base metals like copper as in the case of sterling silver (92.5% silver, 7.5% copper)
Copper is a good conductor of electricity and it is cheap as well. Gold conducts electricity very well but comes at a high cost Graphite is very cheap but does not conduct electricity as well as copper
if you are reffering to outside work such as chairs, handrails, and sculptures then the most popularly used steal is copper or stainless.