I haven't made ball shaped bath bombs in a long, long time but thought the shape would go well with a berry blend fragrance. I put 1/2 of the dry ingredients in to 2 separate bowls and added a small pinch of powdered pink colourant to one bowl and blue to the other bowl. Then I mixed really well with my hands to get nice even looking coloured powders in both bowls. Its easiest to do this before you add any wet ingredients. Heads up here, you'll need a third empty bowl.
What I did next: In the pink mixture I added 1/2 tsp each of Raspberry & Strawberry fragrance and 1/2 tsp of Almond Oil. Again, by hand, I mixed this up real quick and then gave it about 8 sprays of witch hazel. Then "quickly" I did the same in the blue bowl using 1 tsp of Blueberry fragrance. To get the 2 coloured balls, load a big mountain of the pink mixture in to one side of the mold and the same of the blue into the other side of the mold- you can see my mold below. Hold this over the empty bowl and press together really hard letting the excess fall in to the bowl. Carefully remove from the ball shaped mold and continue. I got 4 ball shapes and made a heart shaped bath bomb with what was collected in the 3rd bowl. You can see I mixed the two colours together to get a bit of a Lavender coloured heart. Recipe is at the bottom of this post.
I bought some 2 part clear plastic molds at Christmas time years ago. They used to be in all the stores at that time of year. Now I think you'd have to go to a craft store. I've also seen these metal ones on ebay. I'll have to wait and see how these plastic ones hold up if I start using them a lot.
Tripple Berry Bath Bombs
2 1/4 cups of Baking Soda
1 cup of Powdered Citric Acid
1 small pinch each of pink & blue powdered colourant (optional)
1 Tsp Sweet Almond Oil
1 Tsp Blueberry Fragrance
1/2 Tsp each of Raspberry & Strawberry Fragrance
Witch Hazel in a fine mist sprayer
Mix 1st four ingredients. If you want 2 colours you'll put 1 1/8 cups of baking soda and 1/2 cup of citric acid in to each bowl. Once all the dry ingredients are mixed really well, add the almond oil and fragrance. Mix some more and them spray with the witch hazel to slightly dampen. Pack in to molds.
Let me know if you have an questions!