Fizzie frustraton
It was one that I found on this site, actually, that someone said she had success with.....
½ tsp. liquid soap dyes or food coloring
½ tsp. Fragrance oil or blend of Essential oils
1 ½ cups baking soda (sodium bicarbonate)
3 tablespoons Bubbling Bath Flake (sodium laurel sulfoacetate)
¾ cup citric acid
Spray mister filled with water or witch hazel
Mixing
Place your fragrance and dye in your bowl first. Next add the baking soda and bubbling bath flake. Mix well together. Add your citric acid last. Note: you don't want to add the citric acid to the liquids as it will cause the citric acid to react. Stir mixture together with a spoon to disperse the fragrance and dyes. Blend the entire mixture with your hands until the color and dye are evenly dispersed and the mixture begins to hold its shape in your hand when you press it together. If you find your mixture is too dry and not holding it's shape, spray one or two mists of either water or witch hazel. Blend your mixture some more. You may need to repeat this step a couple of times to get the consistency you need to mold your bath bomb.
Molding
Take a handful of your bath bomb mixture and pack it tightly into your mold. Level off the back of the bomb, trim off any other excess mixture and flip out onto a waxed lined cookie sheet or other flat surface that is lined with wax paper. Allow your bath bomb to set up for one day.
If you find your bath bombs are sticking in the mold, chances are you may have too much water in them. Lightly dust the inside of the mold with baking soda and pack a new bomb in again. One customer told us that she sprays a cloth with cooking spray and wipes the inside of the molds which works for her.
If you find your bombs are crumbling, you probably need to add one or two mists of water and mix well again. Be careful not to over mist.