Why does microblading (hair stroke technique) often fail and why does the color fade/bleed on oily skin with large pores?

In oily skin, the seborrheic (oil) glands produce excessive sebum. Sebum, by its nature, is fluid and seeps into the fine, pigment channels created by micro-blade tattooing. The oil dissolves the pigment molecules, causing them to spread (migrate) into the surrounding tissues. As a result, those fine, hair-like lines created on the first day merge under the skin within a few months, becoming gray, blurry, and almost like a low-quality tattoo shadow. Also, because oily skin has a very high rate of cell renewal, the pigment is quickly pushed to the surface of the skin, and the color fades very quickly. Therefore, powdering is recommended for oily skin instead of micro-blading.