My understanding is this, for what it's worth:
Way back when, when SU sold ink refills for their wheel cartridges and ink refills for their stamp pads, we were informed that we should use the proper refills for each, since the formula was different.
But over time, SU switched over to using stamp pad ink refills for both the stamp pads and wheel cartridges.
My guess would be that you have older refills for the wheel cartridges. If what we were told "way back when" is accurate, then those refills do not have the same formula as the stamp pad ink. I'm not sure whether I would use them on my stamp pads. But the formulas can't be too terribly different, in my opinion.
Use this info in any way you choose...just giving you info on which you can base your choice.
__________________ Diane
On SCS since 2005...Fan Club since 2007
Quiltzi...High Plains Member of Punchkateerz I'll stand with arms high and heart abandoned,
in awe of the One who gave it all.
I'll stand, my soul, Lord, to You surrendered,
all I am is Yours.
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