When can phototherapy nail polish be baked without phototherapy machine?

Without phototherapy, it won't dry. The nature of nail polish is ultraviolet radiation, and natural sunlight will also cure. If you are not afraid of tanning, you can stay in the sun for a long time. It's hard to raise it for nothing, because one hand is tanned and it's too worthless. 1 the old phototherapy machine only needs 40-50. If you often do your own nails, you might as well prepare one. Nail polish is too harmful to the body, and there are many nail polishes.