Well, remember how the solar freckles used a UV-sensitive dye inside of the microcapsules of the tattoo ink?

，还记得日光雀斑是如何在纹身墨水的微胶囊内使用紫外线敏感染料的吗？

So what if we put interesting materials inside of these microcapsules and made tattoo inks with them?

那么，如果我们将有的材料放入这些微胶囊中并用它们制成纹身墨水呢？

Each sheet contains millions of microcapsules, about as wide as a human hair, filled with negatively-charged white pigments and positively-charged black pigments.

每张纸包含数百万个微胶囊，大约与人的头发一， 满带负电的白色颜料和带正电的黑色颜料。

Well, you could also put heat-sensitive dyes inside of microcapsules and you could make different tattoo inks that change color at different temperatures.

，你也可以将热敏染料放入微胶囊中，你可以制作不同的纹身墨水，这些墨水会在不同的温度下改变颜色。

So I thought, why don't we take some microcapsules, load it up with a UV-sensitive, color-changing dye, and make a tattoo ink out of that?

所以我想，我们为什么不取一些微胶囊，在其中装入对紫外线敏感的变色染料，然后用它制作纹身墨水呢？