bath bombs are hard-packed mixtures of dry ingredients which effervesces when meet with water. They can be added essential oils, scent, bubbles and color to bathwater in.
Bath bombs’ primary ingredients are a weak acid and a bicarbonate base. These are unreactive when dry, but react vigorously when dissolved in water to produce their characteristic fizzing over a period of several minutes. This is an acid-base reaction that involves conversion of citric acid and sodium bicarbonate to sodium citrate and carbon dioxide:
C5H7O5CO2H (aq.) + NaHCO3 (aq.) → C5H7O5CO2−Na+(aq.) + H2O(l) + CO2 (g)
There is also a side saponification reaction that produces soap. This involves a reaction between sodium bicarbonate and water, which gives carbonic acid and sodium hydroxide. Sodium hydroxide, in presence of essential oils, undergoes a reaction to give glycerol and fatty acid salts as follows:
HOCO2−Na+(aq.) + H2O (l) → HOCO2H (aq.) + NaOH (aq.)
RCO2CH2CH(O2CR′)CH2CO2R″(l) + 3 NaOH (aq.) → HOCH2CH(OH)CH2OH (l) + RCO2Na (aq.) (+ R’CO2Na + R”CO2Na)
The other ingredients in bath bombs can vary considerably. However, most have scented ingredients as well as dye to impart a pleasant fragrance and color to bathwater. Lathering agents, such as sodium lauryl sulfate, are also often added to create bubble foams.
Shape and effect
Bath bombs are normally ball-shaped, but can be found in a variety of shapes and effect. Shapes could be ball shape,heart shape, cake shape, leaf shape, diamond shape etc. Effect could be single color, mixed color, bath bombs with salt insides, bath bombs with dried flower inside or some toys inside, etc.
BodyNurse as a excellent bath bomb manufacturer and bath bomb supplier with more than 27 years of experience in the personal care and beauty field, mainly produces various bulk bath bomb wholesale supplies. Such as dried flower bath bombs, built-in toy bath bombs, crystal bath bombs, rainbow shower gel bombs, fruit bath bombs, streamers, etc. For bath bombs, we accept OEM ODM request. Besides bath bombs, we can also accept OEM designs for soaps, shampoo gels, masks, body lotions, etc.