Developing a painless self-tattooing technique

Tattoo lovers are forced to sit for long hours and endure the pain of needle pricks in tattoo parlors, while experts have created a small skin patch that allows tattooing without resorting to its salons. techniques.

According to RT, the paper’s principal investigator, Mark Prausnitz, said: “We have miniaturized the needle so that it is painless, but we are still effectively depositing tattoo ink into the skin. Also to create new opportunities for cosmetic tattooing due to its ease of management.”

Prausnitz, Regent Professor and Chair of J. Erskine Love Jr. in the School of Chemical and Biomolecular Engineering, presented the research in iScience, with Georgia Tech Postdoctoral Fellow Sung Lee as co-author.

Tattoos are used in medicine to cover up scars, direct radiotherapy for recurrent cancer, or restore nipples after breast surgery.

Tattoos can also be used in place of bracelets as medical alerts to inform serious medical conditions such as diabetes, epilepsy or allergies.

There are already many cosmetics that use micro-needle in the market, mostly for anti-aging, but the development of micro-needle technology for tattooing is something new.

Prausenitz has studied microneedle patches for years to give drugs and vaccines to the skin without the need for hypodermic needles. We thought others might prefer tattoos that are simply pressed into the skin and don’t hurt.”

Usually tattoos use large needles to puncture the skin repeatedly to get a good shape, and this process may take a long time, in addition to some pain.

The Georgia Tech team developed micro-needles smaller than a grain of sand and made of tattoo ink encased in a soluble matrix. “Because micro-needles are made of tattoo ink, they deposit the ink into the skin very efficiently,” said lead author Song Lee. In the skin only once and then dissolve, leaving the ink in the skin after a few minutes without bleeding.”

tattoo technique

Although most microneedle patches for medicine or cosmetics contain dozens or hundreds of microneedles arranged in a square or circle, microneedle tattoos print a design that can include letters, numbers, symbols, and images. Each microneedle is like a pixel to create a tattoo image of any shape or pattern.

The researchers started with a mold containing microneedles in a pattern that forms an image. They filled the microneedles in the mold with tattoo ink and added a patch backing for comfortable handling. The resulting patch was then placed on the skin for a few minutes, during which time the fine needles dissolved and released the tattoo ink. Incorporating tattoo inks of different colors into the fine needles, including a light black ink that can only be seen when illuminated with UV light.

Prausenitz’s lab has been researching microneedles for vaccine delivery for years and realized they could be equally applicable to tattoos. With support from the Coalition for the Prevention of Pregnancy in Cats and Dogs, Prausnitz’s team began working on tattoos to identify sterilized pets, but then realized the technology could be effective for people, too.

The tattoos were also designed with privacy in mind, and the researchers created patches that are sensitive to environmental factors such as light or temperature changes. The tattoo appears only with UV rays or higher temperatures, providing patients with privacy, revealing the tattoo only when desired.

The study showed that tattoos can last for at least a year and are likely to be permanent, which also makes it a viable cosmetic option for people who want an aesthetic tattoo without the risk of infection or pain associated with traditional tattoos. Micro-needle tattoos can instead be loaded with temporary tattoo ink. To meet the short-term needs in medicine and cosmetics.

According to the researchers, this tattoo can be used in the skin of animals without causing them pain, instead of cutting the ear or putting an ear mark on the animals to indicate the state of sterilization, a painless and secret tattoo can be placed instead.

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