14. Charcoal/Spirulina double batch; Gardener's Scrub & Spirulina Wellness bars - a 50|50 batch 09-03-2026
Recipe Instructions
This is the first time I've reduced the water percentage, down to 28%.
Also, the first time using Sodium lactate - I understand it's OK to use 1 teaspoon per pound of soap so I'll use 2 for this.
Also, I split the batch and using spirulina with one half and charcoal with the other. The Essential oils above were added to the charcoal batch, and I added lavender, lemon and a little yarrow for healing to the spirulina bar.
Spirulina Wellness Bar
This luxurious cold-process soap blends olive oil (64.86%) for mild cleansing, coconut oil (27.03%) for creamy lather, and pumpkin seed oil (8.11%) for deep hydration and antioxidant benefits.
Spirulina powder delivers nutrient-rich green colour and skin-brightening benefits, enhanced by a soothing blend of lavender, lemon, and yarrow essential oils, perfect for calming, rejuvenating wellness rituals.
Benefits: Nourishes dry skin, reduces inflammation, promotes relaxation with subtle blue-green marbling from yarrow oil. Ideal for sensitive skin, post-yoga showers, or daily spa-like cleansing. 5% superfat + sodium lactate creates smooth, long-lasting bars.
Gentle enough for face and body.
Gardener's Scrub Detox Bar
Perfect for hardworking hands, this cold process soap combines olive oil (64.86%) for gentle cleansing, coconut oil (27.03%) for abundant lather, and pumpkin seed oil (8.11%) for skin nourishment and antioxidant protection.
Activated charcoal deeply cleanses dirt, grime, and garden chemicals from pores, while tea tree (45%), eucalyptus (45%), and oregano (10%) essential oils provide powerful antimicrobial action to soothe cuts, scrapes, and insect bites, ideal for gardeners, mechanics, or anyone with dirty hands.
Benefits: Removes embedded dirt, heals minor wounds, fights bacteria. 5% superfat + sodium lactate ensures long-lasting, hard bars that stand up to tough scrubbing.
External use recommended due to potent essential oils.
Rate Recipe
Soap Properties
Highlighted gray ranges represent recommended ranges for each property.
100
80
60
40
20
0
INS: 143.27 (ideal)
iodine: 68.22 (ideal)
Calculated Values for Oils and Preferences
| Superfat % | 5% |
| Saturated | 294 Gram(s) |
| Mono-Unsaturated | 475 Gram(s) |
| Poly-Unsaturated | 101.75 Gram(s) |
| Saturated:Unsaturated Ratio | 66.24:33.76 |
| Lye concentration | 100% |
| Weight Unit | Gram(s) |
| Soap type | solid |
Fatty Acid Profile
| Oleic | 51.35% |
| Linoleic | 11% |
| Linolenic | 0% |
| Ricinoleic | 0% |
| Lauric | 12.70% |
| Myristic | 5.05% |
| Palmitic | 10.05% |
| Stearic | 3.97% |
Recommended Additive Amounts
Swipe on table to see all values
For Advanced Soapmakers
| Sodium Lactate (60%)
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| Recommended Essential/Fragrance Oil | 40.47 Gram(s) | ||||||
| Ascorbic Acid
| 9.25 Gram(s) | ||||||
| Extra Lye to Neutralize Ascorbic Acid for A.A. | NaOH: 1.87 Gram(s) | ||||||
| Lactic Acid
| 6.94 Gram(s) | ||||||
| Extra Lye to Neutralize Lactic Acid for L.A. | NaOH: 4.11 Gram(s) | ||||||
| Tetrasodium EDTA
| 6.56 Gram(s) | ||||||
| Sodium Citrate
| 12.03 - 36.08 Gram(s) | ||||||
| Potassium Citrate
| 14.80 - 44.40 Gram(s) | ||||||
| Rosemary Oleoresin (ROE)
| 0.37 - 0.46 Gram(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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