silver soldering flux in white powder form having ph value 07 09 active at and above 550 degree celsius till 850 degree celsius moisture present should be le ss than 03 percent having no cholorine containing potassium salts after melting i t should give clear and viscous liquid its residual should be easily removable with water packing size u2013 500 grams boxes warranty period 30 months after the date of delivery quantity tolerance 5 age item category normal total po value variation permitted