S/C is cheap, ($1 a can) easily available, really holds the dye well, is easy to store, allows for different color dyes to be "blended" hence the marbling, and the raspberry ladies s/c smells great, and if you run low you can just run into the bathroom and steal the wife's when she's not looking. I'm not saying that the other things you have listed wouldn't work, but let's look at them
S/C is better than sour cream because it's cheaper and easier to store.
S/C is better than yogurt because the dye has to sit for 24 hours, yogurt would be nasty after that long.
Thick liquid soap is a viable option.
Whipped cream is more expensive and harder to store.
Never thought of drywall mud. Huh. Might have to give that a try sometime.
But don't take my word for it, I'd ask Dan, he's the best marble dyer on the planet (that I know anyway)
Good luck................jb
S/C is better than sour cream because it's cheaper and easier to store.
S/C is better than yogurt because the dye has to sit for 24 hours, yogurt would be nasty after that long.
Thick liquid soap is a viable option.
Whipped cream is more expensive and harder to store.
Never thought of drywall mud. Huh. Might have to give that a try sometime.
But don't take my word for it, I'd ask Dan, he's the best marble dyer on the planet (that I know anyway)
Good luck................jb