POS 18 Black Sesame Seeds
Black til is mixed in either milk/water and then offered to Shiva in the form of Abhishek. It is equivalent to doing abhishek with "punchamrat" ( a combination of 5 things)This seed is very dear to Pitrs. Shastras say that it make the person cross the Vaitarini - the sea of bad karma.
During the shraadh ceremony the kartha makes a special offering of til or black sesame seeds to pitrs.