lake dyes

Hi everyone, I was hoping to get some insight on using lake dyes, as I am new to using dyes and I could use some help! I have been trying to make bath bombs with lake dyes and I haven't had any real problems except one. When I hold the bath bomb in my hand (especially if it is wet) it will stain...

I'm not sure where exactly I can buy my colorants from online. I use a lot of lake dyes, but i'm open to trying some other types of colorants if someone has links? It would be appreciated. The one I have now is one I buy locally and I don't much care for how much I have to add to get any...