NOVELTY - A silver slurry is obtained by mixing and ball milling component (A) and component (B). The component (A) comprises 40-50 pts.wt. silver powder having particle size of 1-5 mu m, 40-50 pts.wt. silver powder having particle size of 16-25 mu m, 10-15 pts.wt. silver powder having particle size of 61-90 nm, 10-15 pts.wt. glass powder and 8-12 pts.wt. organic carrier (a). The component (B) contains 5-10 pts.wt. copper powder having particle size of 6-10 mu m and 5-10 pts.wt. copper powder having particle size of 30-60 mu m.    USE - Silver slurry is used for forming conductive silver paste used in manufacture of efficient lead-free solar battery.    ADVANTAGE - The silver paste formed using the silver slurry is free from lead and is environmentally friendly. The battery using the silver paste has high stacking density, conductivity and durability.    DETAILED DESCRIPTION - A silver slurry is obtained by mixing and ball milling component (A) and component (B). The component (A) comprises 40-50 pts.wt. silver powder having particle size of 1-5 mu m, 40-50 pts.wt. silver powder having particle size of 16-25 mu m, 10-15 pts.wt. silver powder having particle size of 61-90 nm, 8-12 pts.wt. organic carrier (a), and 15-20 pts.wt. glass powder (A) comprising 20-40 pts.wt. silica, 10-20 pts.wt. bismuth trioxide, 5-10 pts.wt. sodium fluoride, 2-8 pts.wt. alumina, 2-8 pts.wt. titanium oxide, 1-5 yttrium oxide, and 1-5 pts.wt. cobalt oxide. The organic carrier (A) is prepared by mixing 30-40 pts.wt. ethylene glycol, 15-20 pts.wt. dibutyl phthalate, 10-20 pts.wt. ethylene glycol, 5-10 pts.wt. polyvinyl butyral, 2-5 pts.wt. silver and 1-5 pts.wt. additive. The component (B) comprises 5-10 pts.wt. copper powder having particle size of 6-10 mu m, 5-10 pts.wt. copper powder having particle size of 30-60 mu m, 3-6 pts.wt. organic carrier (b) and 5-10 pts.wt. glass powder comprising 10-20 pts.wt. silica, 10-20 pts.wt. boron trixoide, 5-10 pts.wt. barium oxide, 2-5 pts.wt. bismuth oxide, 1-5 pts.wt. tin oxide and 1-5 pts.wt. sodium oxide. The organic carrier (b) is prepared using 10-20 pts.wt. benzyl alcohol, 5-10 pts.wt. butyl carbitol acetate, 5-10 pts.wt. propylene glycol monobutyl ether, 2-5 pts.wt. ethyl cellulose, and 0-3 pts.wt. additive. An INDEPENDENT CLAIM is included for preparation of silver slurry.