In fireworks, it is common to have pink smoke bombs. These get sold for gender reveal parties too.

The way they work is there is a dye in them that releases pink ash particles when burned. (or blue or orange and so on for other color bombs). Some printing inks will give off pink smoke too when burned. So it doesn't necessarily require iodine. And possessing iodine is illegal many places due to its possible use in a meth production process. You can't buy straight iodine in a drugstore anymore, though you can buy povidine which is highly dilute and doesn't work in smoke bombs.

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