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Recipe Instructions
CHARCOAL SOAP — FINAL RECIPE CARD (47 oz batch total)
Fragrance: Library (CandleScience)
Goal: Slow trace, fluid batter, stable swirl-friendly formula
Superfat: 6%
Oils: 32 oz total
Finished Batter Weight: ~47 oz
OILS (32 oz total)
Ingredient%WeightSafflower Oil19%6.08 ozSweet Almond Oil19%6.08 ozCoconut Oil20%6.40 ozPalm Oil22%7.04 ozHemp Seed Oil10%3.20 ozCastor Oil5%1.60 ozMango Butter5%1.60 oz
LYE + WATER (6% Superfat)
These numbers give you the slowest moving batter possible while still curing into a firm bar.
- Lye (NaOH): 4.60 oz
- Water: 11.50 oz
- Full Water Ratio: 2.5–2.7:1 (no discount)
This keeps it fluid and workable, especially with charcoal.
CHARCOAL ADDITION
For 32 oz oils:
- Activated Charcoal: 2 tsp (max for slow trace, deep color)
- Premix into 1–2 tbsp of your oils
- Add at emulsion, not trace
FRAGRANCE
Library from CandleScience is very well behaved.
Use:
- 0.8–1 oz per pound of oils
- For 32 oz oils → 1.6–2 oz fragrance
Add right after emulsion for the most fluid pour.
PROCESS NOTES (For Slow Trace)
Follow these and your batter will act like it’s on vacation:
- Soap cool: 80–85°F
- Stick blend ONLY to emulsion
- Add fragrance
- Add charcoal slurry
- Hand-stir to avoid thickening
- Pour immediately
This formula is designed to stay slow even when charcoal tries to speed-run the process.
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Soap Properties
Highlighted gray ranges represent recommended ranges for each property.
100
80
60
40
20
0
INS: 126.81 (low)
iodine: 83.07 (high)
Calculated Values for Oils and Preferences
| Superfat % | 2% |
| Saturated | 10.47 Ounce(s) |
| Mono-Unsaturated | 11.03 Ounce(s) |
| Poly-Unsaturated | 9.49 Ounce(s) |
| Saturated:Unsaturated Ratio | 33.77:66.23 |
| Lye concentration | 100% |
| Weight Unit | Ounce(s) |
| Water Discount % | 1% |
| Soap type | solid |
Fatty Acid Profile
| Oleic | 29.97% |
| Linoleic | 27.19% |
| Linolenic | 2.48% |
| Ricinoleic | 4.50% |
| Lauric | 9.60% |
| Myristic | 4.02% |
| Palmitic | 14.82% |
| Stearic | 4.26% |
Recommended Additive Amounts
Swipe on table to see all values
For Advanced Soapmakers
| Sodium Lactate (60%)
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| Recommended Essential/Fragrance Oil | 1.40 Ounce(s) | ||||||
| Ascorbic Acid
| 0.32 Ounce(s) | ||||||
| Extra Lye to Neutralize Ascorbic Acid for A.A. | NaOH: 0.06 Ounce(s) | ||||||
| Lactic Acid
| 0.24 Ounce(s) | ||||||
| Extra Lye to Neutralize Lactic Acid for L.A. | NaOH: 0.14 Ounce(s) | ||||||
| Tetrasodium EDTA
| 0.24 Ounce(s) | ||||||
| Sodium Citrate
| 0.42 - 1.25 Ounce(s) | ||||||
| Potassium Citrate
| 0.51 - 1.54 Ounce(s) | ||||||
| Rosemary Oleoresin (ROE)
| 0.01 - 0.02 Ounce(s) | ||||||
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Citric Acid Powder (anhydrous) |
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Extra Lye to Neutralize Citric Acid Powder for C.A. |
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