# An invisible image - Clue Ten

<---Previous clue

[redacted] [redacted] [redacted] [redacted] [redacted] [redacted] [redacted]

"Where?" you ask. "I don't see anything."

"That's the point - the image is invisible, doofus."

You don't appreciate being called a doofus, but you step forwards anyway and peer at the apparently empty screen in front of you. You turn around.

"What-"

The question dies in your throat as you realize that [redacted] is gone. With a sigh, you turn to the screen again:

And then the second screen:

Next clue--->

• -1 because this puzzle is inherently impermanent. – Will Aug 15 '16 at 19:13
• @Will Whaddya mean? I'm leaving that in my profile. If not, I'll change the puzzle to a screenshot. – Mithical Aug 15 '16 at 19:15
• -1 both for @Will's reason and because the puzzle is uninteresting. It's just a long chain of QR codes. – Deusovi Aug 15 '16 at 19:19
• @Deusovi I was going to add another step but I forgot. o_o I accept the DVs. – Mithical Aug 15 '16 at 19:20
• Its a different sort of puzzle but you over-used the QR Codes. – Beastly Gerbil Aug 15 '16 at 19:24

## 2 Answers

The images hide

two QR codes, using transparency for "white" and white for "black":

They say

see my profile and all the way at the bottom: in Mithrandir's profile there is another link to another QR code.

That one says

http://i.stack.imgur.com/ch3wd.png, which is another link to a QR code.

That one says

http://i.stack.imgur.com/gpaTg.png, which finally isn't a link to a QR code! It's a link to a regular bar code instead.

And that one finally says

Magnesium.

• Think I beat you to it by a few seconds! +1 though as you got the answer too – Beastly Gerbil Aug 15 '16 at 19:26
• @BeastlyGerbil I saw this complete answer before your grace period edit. ;) – Will Aug 15 '16 at 19:27
• @BeastlyGerbil: No, you didn't. I beat you to it, and then you edited your answer in the grace period. (Also, how does a barcode decode to something in bold? There's no syntax for that.) – Deusovi Aug 15 '16 at 19:27
• @Deusovi I don't know my QR scanner just said magnesium and it was bold. Sorry if you beat me to it - I'll ask Mithrandir to transfer the accept if you all think that – Beastly Gerbil Aug 15 '16 at 19:29
• Requested the accept to be transferred - don't know if @Mithrandir is still active though... – Beastly Gerbil Aug 15 '16 at 19:32

By saving the first image it comes up with a QR code:

By scanning it I get the information:

See my profile

The second image gives us another QR:

Which gives us:

All the way at the bottom

In his profile at the bottom it says:

For Clue 10: http://i.stack.imgur.com/SriHL.png

The link gives us:

Which decodes to

http://i.stack.imgur.com/gpaTg.png

Which gives us a barcode:

Which decodes to:

Magnesium (In bold)