By Abhilash on Monday, July 19, 2004 - 10:59 am:
Hey guys,
I gotta do Paper C'graphy of Red and Blue fountain pen inks..........in what proportion should i use EtOH and H2O for the solvent?
By chromatographer1 on Monday, July 19, 2004 - 12:17 pm:
do test strips of 100:0, 75:25, 50:50, 25:75, 0:100
Then think and go from there.