Candle tunneling happens when a candle burns straight down the center, leaving unmelted wax stuck to the sides—wasting wax and shortening burn time. It usually means the wick is too small for the candle’s diameter and/or wax type, so prevention comes down to proper wick sizing through testing, and making sure the first burn is long enough (about 2–4 hours) to create a full melt pool edge-to-edge (and teaching customers to do the same).
Other Terms
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Pustule
An inflamed blemish containing pus.
ROE (Rosemary Oleoresin Extract)
A natural antioxidant added to soap to slow oil oxidation and help prevent rancidity.
RRD Wick
A flat braided series often used for pillars and tapers, chosen for controlled burn rates.
Raking
Distributing product by pulling through sections with fingers for even coverage.
Rancidity
The breakdown and oxidation of oils in soap, leading to off smells, discoloration, and reduced quality over time.
Reaction Rate
Speed at which the fizzing reaction occurs.
Reapplication
Applying additional product throughout the day to maintain protection.
Rebatch Soap (Hand Milled Soap)
A method of grating and remelting finished soap to reshape or enhance it without starting the saponification process from scratch.
Recipe Formulation (Cold Process)
The process of selecting and balancing oils, lye, and additives to create a stable, safe, and effective soap.
Recipe Library
Organized collections of tested formulas.
Record Keeping
Documenting formulas, dates, temps, and results to improve consistency and traceability.
Refrigeration (Skincare)
Cold storage used to extend freshness or calm skin.
Reheating Melt and Pour
Reheating Melt and Pour: Gently warming previously melted soap to return it to a pourable consistency without burning or boiling it.
Retinization Period
The adjustment phase where skin builds tolerance to vitamin A derivatives.
Retinoids
A class of vitamin A–based compounds used to improve texture, tone, and signs of aging.
Retinoids (Acne)
Vitamin A–based treatments used to reduce breakouts and improve texture.
Retinoids (Anti-Aging)
Vitamin A–based treatments used to reduce aging signs.
Retinol
A vitamin A derivative used to promote cell turnover and reduce signs of aging.
Retinol Irritation
Redness, dryness, or peeling that can occur when skin adjusts to vitamin A products.
Retinol Percentage
The concentration level that determines strength, effectiveness, and irritation risk.
Rice Bran Oil
A lightweight, antioxidant-rich oil that nourishes skin and adds a silky, smooth feel to soap.
Rice Bran Oil (Body Care)
A conditioning oil valued for softness and barrier support.
Ricing
A sudden thickening of soap batter that creates a grainy, rice-like texture during mixing.
Rinse-Out Conditioner (Regular Conditioner)
An everyday softener applied briefly and rinsed away for quick manageability.
Root Lifter
A targeted product used near the scalp to boost lift and support at the roots.