Congratulations on your new tattoo!
Human skin is comprised of three layers:
1) the Epidermis (top layer),
2) the Dermis (middle layer), and
3) the Hypodermis tissue (bottom layer).
A tattoo happens when a needle (or group of needles) is dipped into ink (color pigment solution) and then pierces the skin, depositing pigment particles into the dermis. A special type of white blood cells, called “macrophages,” eat the ink particles and trap them in the dermis. When those cells die, a new generation of macrophages replaces them and eats the ink particles that the dying white blood cells left behind. This is what makes tattoos permanent and also what makes them spread or become blurred over time.
When the tattoo needles pierce at too shallow of a depth, the ink settles into the epidermis (top layer) instead of the dermis (middle layer). The ink is not trapped in the epidermis. Instead, the top layer of skin cells is continually shed. This is one reason why some tattoos fade too quickly or why patches of color or sections of lines become erased.
Another possibility is the use of an ink pigment that is not permanent under different lighting conditions. UV rays from sunlight can fade tattoos that are done with non-permanent or non-photostable ink pigments. This is why I personally research the chemical composition of every ink pigment particle that I use in my tattoos and keep spreadsheets and data tables about the MSDS and lab analysis for longevity and stability under daylight, UV, and lasers (when available) of pigments used from every tattoo ink manufacturer that I buy from. Many tattoo artists do not even know what is in their inks.
You can help preserve the longevity of your tattoo by staying out of the sunlight. You should also wear sunscreen on your fully healed tattoo, but do not start wearing sunscreen on your tattoo until 4 – 6 weeks after your tattoo appointment. You do not want sunscreen on your fresh tattoo while it is still healing.
Blowouts are when the ink spreads too far outside of the intended area or line. Blowouts happen when the ink is deposited too deeply, into the hypodermis (bottom layer). You can “fix” a holiday with more ink. Unfortunately there is no cure for blowouts, aside from possibly laser removal. That’s why I try to err on the side of too shallow, rather than too deep.
If you have any questions or concerns with how your tattoo is healing, please take a photo and send it to your artist via e-mail. If a touch-up appointment is necessary, we can discuss it together. Thank you.