Bath Bomb Mold

thingiverse

My son was eager to create some bath bombs for his mom's Christmas gift after watching an online tutorial. To avoid buying multiple molds, I designed this one to produce a batch of them efficiently. The instructions we followed can be found at [https://www.popsci.com/how-to-make-your-own-bath-bombs](https://www.popsci.com/how-to-make-your-own-bath-bombs). According to the guidelines, it's best to pour the finished mixture into the molds and let them dry before removal. However, we chose a different approach - compressing the mix into circular pucks that could be removed immediately with care. We only needed to print one bottom mold, either a blank or heart-shaped design. I made sure to keep the parts loose to prevent any binding issues caused by the gritty mixture. The necessary ingredients included citric acid, cornstarch, and essential oils (lavender and lemon), all of which we purchased from Amazon. Epsom salts were acquired from our local grocery store, while baking soda was bought at Costco during one of our regular visits. The bath bombs in the picture feature a lavender theme, complete with lavender buds added to the mix for extra fragrance. These buds were also sourced from Amazon. To create the mold parts, we used 3 wall layers, 4 top and bottom layers, and 20% infill to ensure they could withstand the force applied without deforming. Given my size - 310 pounds - I decided to use a bit more force than usual when compressing the mixture. We placed the mold bottom in the ring, loaded it with approximately half a cup of mix, and then pressed down on it using the center of the mold. This caused the bath bomb to be ejected into our hands, where we carefully removed it from the bottom. We repeated this process until all the mix was used up. One notable feature of this mold design is its ability to handle varying amounts of mixture without affecting the outcome. If you're aiming for a specific weight, you can adjust the amount of mix accordingly and still achieve consistent results.