I BAUGHT ETERNAL PITCH BLACK NOT REALIZING IT WAS A LINER INK..CAN I STILL USE IT FOR BLACK AND GREY OR WILL IT BE TOO WATERED DOWN..I MOSTLY HAVE BEEN USING DISTILLED WATER TO MIX..ONE SOLID CUP ONE 50. AND ONE 25..BUT I MOSTLY JUST USE THE 50 AND THE SOLID..WAS WANDERING IF ANY ONE KNOWS OR HAS USES ETERNAL PITCH BLACK FOR BLACK AND GREY AND NOT JUST TO LINE WITH