Carbon Dioxide (CO2)
The gas produced during fizzing reaction creating bubbles and agitation in bathwater. CO2 is what makes bath bombs "bomb"—the dramatic fizzing and bubbling effect.
Other Terms
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Surfactant
Cleansing agents that help water and oil mix to lift away impurities.
Surfactant (Hair Care)
A cleansing agent that lifts oils and dirt so they can rinse away.
Surfactant Guide
A reference to help choose cleansing ingredients based on mildness, foam, and compatibility.
Suspending Additives
Suspending additives involves keeping heavier ingredients evenly distributed throughout the soap so they don’t sink or settle.
Suspending Botanicals
Suspending Botanicals is a soap-making technique where dried flowers, herbs, or plants are evenly held within the soap for visual and textural interest.
Suspension Base (Embed Base)
A thick, clear soap base designed to suspend and hold decorative additives like herbs, glitter, or small embeds in place.
Sweating
Moisture forming on the surface of soap when glycerin attracts humidity from the air, often in warm or damp conditions.
Sweating (Candles)
Beads or droplets forming on the surface when oil migrates out of the wax over time.
Sweet Almond Oil
A light, nourishing oil that soothes and softens skin, making soap gentle and moisturizing.
Sweet Almond Oil (Bath Bombs)
A lightweight, nourishing oil that softens skin without making the product greasy.
Sweet Almond Oil (Body Care)
A lightweight, nourishing oil used to soften and condition skin.
Sweet Almond Oil (Hair Care)
A softening option that adds slip and shine, especially for dry lengths and ends.
Swirling
A decorative technique that creates artistic patterns in soap by gently moving colors through the batter before it sets.
Swirling Colors
Blending colors together to form flowing or marbled effects.
TEWL (Trans-Epidermal Water Loss)
Water loss from the skin surface leading to dryness.
Taiwan Swirl
A Taiwan Swirl creates thin, intricate lines by swirling layered soap batter horizontally with a precise, controlled tool.
Tallow (Beef Tallow)
A solid animal fat that produces hard, durable soap with a rich, creamy lather and excellent moisturizing properties.
Tamanu Oil
A therapeutic oil prized for soothing and restorative properties.
Taper Candles
Long, slender candles made to fit candle holders and burn slowly with a classic, elegant look.
Tapioca Starch
A smooth starch that helps enhance firmness and dissolve evenly.
Tare Function
Zeroing the scale with a container on it so only the added ingredients are measured.
Tea Tree Oil
A botanical oil with antimicrobial properties used cautiously for blemishes.
Tea and Herbal Infusions
Liquid extracts from tea or herbs used in soapmaking to add color, fragrance, antioxidants, and skin-soothing properties.
Tealight Candles
Small, shallow candles that provide short burn times and are commonly used for accents or warm ambient light.
Telogen Effluvium
A temporary shedding spike often triggered by stress, illness, or major life changes.