And then it turned into a Black Sabbath video from the early 70s . . .

...new set of items for the ol' trip-toy box...

Coooooool...that ranks right up there with pigeon's redneck lava lamp.

What's the science behind this? Why does it happen?

The milk is denser than the water-based food coloring so the food coloring stays on and near the surface.

The soap reduces the surface tension of the liquid. The stronger surface tension of the surrounding milk then pulls the surface away from the weak, soapy region. The food coloring moves with the surface, streaming away from the soap. The surface will continue to stream away from a large drop of soap for awhile and produce that churning effect until the soap has diffused into the solution and been taken up by the fat in the milk.

Eventually all of the fat globules in the milk will be surrounded by soap and some soap will remain on the surface causing surface-tension-driven convection to stop.

i'm not into chemistry, but from my basic search ... it's caused by a chemical reaction between the soap molecules, dye molecules, polarity of each, etc ... the milk/cream just makes it look cooler!!

thanks rickegee

Am I the only one that saw the form of a cow's face?

*dead

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