Hi @Claude_Rieth : What you are seeking are good colloidal dispersions. Milk is a colloidal dispersion, i.e. fat molecules in water. Colloidal dispersions have particles of one substance suspended in another substance. These suspended particles are what scatter the light.
What you are looking for are ways to suspend small particles in water, i.e. making a colloidal dispersion. I would recommend that you experiment dissolving some white bar soap in water. The titanium dioxide, the white pigment in the soap, should be suspended in water because the soap molecules are good surfactants. The titanium dioxide molecules suspended in the water will disperse light. Also, latex paints are colloidal dispersions. You can try mixing different latex paints with water. Finally, certain personal care products like shampoos which have a pearlescence look to them could be good candidates to mix with water.
Thanks for your feedback @Ken_White , and giving me the right words “colloidal dispersion” for what I was looking for.
I’ve just tried with soap and shampoo. Both work really well, the shampoo seems to perform a little better, maybe because it is liquid already and dilutes better in the water. I’ll try adding some shampoo to the water in the bottle, that should give great results.
Hi @Claude_Rieth : I am glad to hear of your success with the soap and shampoo. For the soap, you might need to use hot or boiling water to dissolve the soap and then you can let the soap mixture cool to room temperature before trying it out with the RGB LEDs. Don’t forget to experiment with different amounts of soap or shampoo with the water which is changing the concentration of the soap or shampoo in the water.
I am looking forward to you posting more videos of your experiments!
I used to demonstrate makeup glitter in water to youth, and it looked awesome. Never tried it with LED’s though, and it would also settle if not moved around. An example https://www.youtube.com/watch?v=s12wyR9g1lM
