There are 5 colors that the new ink should not be put on old pads and the old ink should not be put on the new pads. They had to be reformulated to work on the new pads, and so should not be mixed.
I don't remember all the colors, but Tempting Turquoise and Basic Black and Basic Gray were in that group, if I remember right. Could someone else get the correct five colors?
Quiltzi...High Plains Member of PunchkateerzI'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.