Crafting Candle and Soap Making 2 — Questions and Answers
Question 1: What is 'soda ash' in cold process soap and how is it prevented?
- A harmless white powder on soap surfaces caused by partial saponification of exposed oils; prevented by covering the mold or spraying with alcohol (Correct answer)
- A chemical additive used to harden soap
- A type of lye used in hot process soap
- An essential oil by-product that causes discoloration
Correct answer: A harmless white powder on soap surfaces caused by partial saponification of exposed oils; prevented by covering the mold or spraying with alcohol
Soda ash forms when unsaponified oils react with air, leaving a white powdery film; covering the mold tightly or spritzing the top with isopropyl alcohol prevents it.
Question 2: What is 'trace' in cold process soap making?
- The stage when soap batter thickens to a pudding-like consistency where drizzles leave a temporary impression on the surface (Correct answer)
- The first mixing of lye into water
- The point at which colorants are added
- When soap is removed from the mold
Correct answer: The stage when soap batter thickens to a pudding-like consistency where drizzles leave a temporary impression on the surface
Trace indicates that the oils and lye water have emulsified enough that the mixture holds a trail on its surface when drizzled, signaling it's ready for colorants and pouring.
Question 3: Which oil is high in lauric acid and commonly added to soap recipes to increase lather and hardness?
- Coconut oil (Correct answer)
- Olive oil
- Sweet almond oil
- Castor oil
Correct answer: Coconut oil
Coconut oil is rich in lauric acid, which contributes to a firm, long-lasting bar and produces a fluffy, cleansing lather.
Question 4: What is the purpose of adding castor oil to a soap recipe?
- Boosting and stabilizing lather (Correct answer)
- Making the soap harder
- Adding conditioning properties
- Speeding up saponification
Correct answer: Boosting and stabilizing lather
Castor oil contains ricinoleic acid, which attracts and holds moisture in lather, creating a richer, more stable foam even in small amounts (5–10%).
Question 5: What safety equipment is essential when working with lye (sodium hydroxide) in soap making?
- Safety goggles, rubber gloves, and long sleeves (Correct answer)
- Only rubber gloves
- A face mask and apron only
- No protective gear is needed for small batches
Correct answer: Safety goggles, rubber gloves, and long sleeves
Lye is highly caustic and can cause severe chemical burns on skin and eyes, requiring full eye protection, chemical-resistant gloves, and covered skin at all times.
Question 6: What type of wax is used to make 'container candles' versus 'pillar candles'?
- Container candles use softer waxes with lower melt points; pillar candles require harder waxes with higher melt points (Correct answer)
- Both use the same wax formulation
- Pillar candles use softer wax; containers use harder wax
- Container candles use only beeswax
Correct answer: Container candles use softer waxes with lower melt points; pillar candles require harder waxes with higher melt points
Soft waxes like soy 464 adhere well to glass containers, while harder waxes like paraffin 140°F or high-melt soy blends allow pillar candles to stand unsupported.
Crafting Candle and Soap Making 2
What is 'soda ash' in cold process soap and how is it prevented?