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  • It's an art form that's been around for thousands

  • of years and shows no sign of slowing down.

  • If you don't have them, chances are your friends

  • or at least your favorite barista does:

  • Tattoos.

  • This week, we're all about ink, so think carefully

  • about what you want on your body permanently

  • as we tattoo some knowledge on your brain.

  • (SPLASH INTRO)

  • Thousands of years ago, when hipsters of that

  • era were getting tattoos, many different

  • ingredients were used for inks.

  • Different colors came from ground up

  • natural products like copper, ashes, graphite, tree bark and woad.

  • Today our inks have evolved, and multiplied.

  • Tattoo artists use so many different pigments

  • for colors that if you have two different tattoos

  • from two different places, there's a chance

  • that ink in your right arm is made up of

  • different stuff than that ink in your left arm.

  • No matter what the ink ingredients are,

  • it's a straightforward recipe:

  • A solid pigment creates the color and is suspended in a liquid carrier.

  • Liquid carriers can include any on or combination of the following:

  • water, witch hazel, glycerine, propylene,

  • and alcohols anywhere from ethanol

  • to vodka to even Listerine.

  • There's a wide variety pigments ingredients, too.

  • Here's some of the different forms of black,

  • brown, red, green, blues, violets and whites.

  • Why are tattoos permanent?

  • So as you might know, skin cells live for about

  • two or three weeks, but tattoos last forever.

  • And if you've ever thought that tattoo

  • On your inner lip will disappear after

  • six months, you're dead wrong.

  • It will never disappeartrust me

  • To explain why tattoos are permanent

  • here's Rachel Feltman from the Washington Post's Speaking of Science.

  • Conveniently, she is in the middle of getting a tattoo:

  • The tattoo needles, which have ink stuck

  • between them, are puncturing my skin about 50-3,000 times per minute.

  • They're going through the epidermis and into the dermis.

  • They're making holes there and capillary

  • action is drawing ink down into the dermis.

  • Now what makes a tattoo permanent is when

  • my immune system is trying to save me

  • from all of wounds that I'm suffering from.

  • Basically, every time the tattoo needle makes

  • a hole, macrophage cells will start to go

  • towards the wounds to try to close it up.

  • And, because the ink is a foreign invader, the

  • macrophage cells gobble it up to try to get rid of it.

  • But instead the macrophage cells with bellies full

  • of ink, get stuck in the gel-matrix in the dermis.

  • And they stay there pretty much forever, which is why the tattoo stays visible and permanent."

  • She makes it look so painless.

  • So when your tattoo is brand new, the ink is in both

  • the epidermis and the dermis layer of your skin.

  • But as the skin heals, the wounded epidermal cells

  • are shed and replaced with new ink-free cells.

  • This is why your tattoo looks more vibrant before it's done healing.

  • Your epidermis regenerates in about two to four weeks.

  • Over time, tattoos will fade as the body's immune

  • system slowly breaks down the alien pigment

  • particles and the macrophages take them away to be destroyed.

  • But generally, the ink will stay with you

  • for most -- if not all -- of your life.

  • Trust me.

  • We'd like to give several shoutouts for people

  • who've made this episode possible.

  • First we'd like to thank Fatty's Tattoos and the

  • very talented Sabrina Elliot for her tattoo work.

  • We'd also like to thank the Washington Post

  • and Post TV for working with us on this video.

  • For more information on tattoos, check our

  • Claudia Aguirre's article and website.

  • We've posted the links in the description.

  • Be sure to like share and subscribe.

  • If you have any topics you'd like to see us cover,

  • let us know right down there in comments

  • or hit us up on Facebook or Twitter.

  • Thanks for watching.

It's an art form that's been around for thousands

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B2 中高級 美國腔

為什麼紋身是永久性的? (Why are Tattoos Permanent?)

  • 43 3
    Huahua 發佈於 2021 年 01 月 14 日
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