[acidrain]

They're all different, and it does make a difference. Use dilute battery acid or lab grade acetic acid to lower, and amonia to raise the PH. Only a couple of drops at a time, and then test with a digital meter after it's mixed and settles down.
RED BORDEAUX 6
YELLOW 4A 6
BLUE 4 A 6
VIOLET 3D 6
BLACK HBL 5.5
GREEN SCG 6.6
GOLD S 6
TURQUOISE 5.5
OLIVE DRAB 7.5
GOLDEN ORANGE 7
GREY BL 5.5
BROWN GL 6.5
TEAL 5.5
ELECTRIC BLUE 6
COPPER BF 7
FLOURESCENT PINK unk
BRONZE 5.5
DEEP RED 5.5
FLOURESCENT YELLOW 6
GREEN AEN 6
VIOLET DS 6
GREY NLN 5.5
YELLOW 3GL 6
BROWN BL 6.5
FAST BLUE 5.5
ORANGE 3A 6