Why the label printing sticky dirty

The back of the printed matter is the next print of the positive ink sticky, or the printing ink on the drum to another print on the back, the reason is: the ink permeability is poor, or curing too slow, ink dosage is too large, paper surface adsorption is poor.
Solution to improve ink penetration drying and solidification: appropriate to reduce the amount of ink, the selection of strong absorbent paper.