invisible ink which gets visible when wet

[BorisB]

Anybody knows who is producing such ink?

[StuJohnston]

I think Matsui does, but I haven't had any luck with getting info from them. If you can, I would be interested in finding out where to get it and price if possible.

[abchung]

Here is the matsui version.
http://www.matsui-color.com/hydrochromic

[Homer]

Here is the matsui version.
http://www.matsui-color.com/hydrochromic

I believe this is the opposite of what the op is looking for, although that is pretty cool too. This was on an episode of shark tank...here is the product

http://www.viewsport.us/collections/men

[BorisB]

I think Matsui does, but I haven't had any luck with getting info from them. If you can, I would be interested in finding out where to get it and price if possible.

Stu thanks for link, but I really need just the opposite.

Boris

[screenxpress]

Is this to have dark circles appear as pasties at a wet tshirt contest??

[Screened Gear]

Is this to have dark circles appear as pasties at a wet tshirt contest??

I was thinking the same thing. That ink can only be for a wet t-shirt contest or a foam party.