I work with Ranger Alcohol Inks on Yupo paper.  There are  two inks of other brands that I use as I cannot get the color or effect desired with Ranger.  The reason I try to stick with one brand is that I find the consistency to vary in different brands which affects drying time.  I also don't want to mix brands as I feel that the formulas are different and I don't want to have a problem down the road as to permanency.