Name: Why are Tattoos Permanent?
Uploaded: 2018-02-02T07:43:53.000Z
Duration: 3 min 55 s
Description: Thousands of YouTube videos with English-Chinese subtitles! Now you can learn to understand native speakers, expand your vocabulary, and improve your pronunciation...

Relative clauses (Restrictive vs. nonrestrictive)

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

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.

Thousands of years ago, when hipsters of that

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

different stuff than that ink in your left arm.

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,

There's a wide variety pigments ingredients, too.

Here's some of the different forms of black,

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

So as you might know, skin cells live for about

two or three weeks, but tattoos last forever.

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.

action is drawing ink down into the dermis.

Now what makes a tattoo permanent is when

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."

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

We'd like to give several shoutouts for people

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

We've posted the links in the description.

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

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Why are Tattoos Permanent?

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