NOVELTY - A positive silver slurry is prepared by heating bismuth oxide, zinc oxide, boron oxide, aluminum oxide, silicon oxide, calcium oxide and titanium oxide; ball milling the melted mixture; quenching with deionized water; screening to obtain leadless glass adhesive; mixing ethylene cellulose, chlorinated acetate resin, phenolic resin and solvent; heating the mixture to obtain yellow transparent organic adhesive; mixing prepared glass adhesive, silver powder and prepared organic adhesive; grinding obtained mixture; adding organic prepared adhesive and thinner; and stirring.    USE - Method of preparing a positive silver slurry (claimed) for environment-friendly silicon base solar cell.    ADVANTAGE - The method is environment-friendly; and prepares slurry having no lead, cadmium, mercury, chromium IV, polybrominated biphenyl and polybrominated diphenyl ether prohibited by the Restriction of Hazardous Substances (RoHS) order of European Union and meets 2005/84/EC Standard related to the phthalic acid ester of European Union RoHS.    DETAILED DESCRIPTION - A positive silver slurry is prepared by:    (A) mixing (wt.%) bismuth oxide (45-55), zinc oxide (20-30), boron oxide (20-25), aluminum oxide (0-4), silicon oxide (0.5-4), calcium oxide (0-4) and titanium oxide (0-4);    (B) heating the mixture at 900-1200 degrees C for 30-60 minutes, ball milling the melted mixture to obtain particles having a size of 0.5-2 mu m, quenching with deionized water, and screening using 200-400 mesh sieves to obtain leadless glass adhesive;    (C) mixing (pts.wt.) ethylene cellulose (0.8-1.2), chlorinated acetate resin (0.3-0.7), phenolic resin (0.3-0.7) and solvent (7-9), and heating the mixture at 90-120 degrees C to obtain yellow transparent organic adhesive;    (D) mixing (pts.wt.) prepared glass adhesive (0.1-0.5), silver powder (7.5-8.5) having a grain diameter of 0.2-1 mu m and prepared organic adhesive (0.9-1.1); and    (E) grinding obtained mixture, adding (pts.wt.) organic prepared adhesive (0.1-0.3) and thinner (0.4-0.6), and stirring.