(cheery music)
- It can be beetles
that come off a cactus,
it can be the dried urine of a cow,
little insects that grow on an oak tree,
a chunk of lead that's soaked in vinegar.
It's truly amazing.
(cheerful music)
We're in Harvard University,
outside the Forbes pigment collection.
Pigment is a very small
particle of colored material
that is mixed in with a binding medium.
The pigment gives paint its color.
(Bright music)
The Forbes pigment collection has been
brought together over several decades.
We have around 2,500 pigments.
We have a lot of very
unusual and very rare colors.
So this is, I think, one of the
more unusually named pigments.
It's called dragon's blood.
It doesn't come from dragons,
it comes from rattan palms.
And it give a very bright red pigment.
The unusual aspect of mummy has to do
with its source rather
than the color itself,
and that comes from Egyptian mummies.
And it's the resin that's applied
to the outside of the bandages.
I think the rarest color that we have
is actually an entire
ball of Indian yellow.
And this is a pigment that is made
from the dried urine of cows
that are fed only on mango leaves.
If you're looking at a work of art,
and you want to understand
what is original
and what's a restoration, you will take
a tiny sample of pigment and analyze it.
A lot of the pigments are actually toxic,
so you don't want to handle the pigments
and then go out to lunch.
There's a green called emerald green
that has an arsenic center to it.
We can use them for telling
if something is real or not.
People will say this
is by a certain artist,
and we can look at the
materials that are used
and decide if those
materials were available
during that artist's lifetime.
If not, then we have to look at
who might have painted that picture.
I can't pick a personal favorite.
There's, it's like asking
to pick a favorite child.
No, the other 2,400 would feel left out.
(laughing)
(relaxing music)
