HLB計算ツール

required HLB of the phase = Σ(shareᵢ × required HLBᵢ) ÷ Σshareᵢ   # over the oils with a figure
share of the high-HLB emulsifier = (target − HLB_low) ÷ (HLB_high − HLB_low)
blend HLB = share_low × HLB_low + share_high × HLB_high

• W. C. Griffin, "Classification of Surface-Active Agents by HLB", Journal of the Society of Cosmetic Chemists 1 (1949) 311–326; and "Calculation of HLB Values of Non-Ionic Surfactants", JSCC 5 (1954) 249–256. — Defined for non-ionic surfactants only. An ionic or polymeric emulsifier has no HLB in this sense.
• The HLB of a blend is the mass-weighted mean of its components’ HLB values: HLB_blend = Σ(wᵢ × HLBᵢ) ÷ Σwᵢ. This additivity is the property that makes blending to a target possible and is stated in Griffin (1954).
• The required HLB of an oil is determined experimentally and published in supplier and handbook tables; the required HLB of a mixed oil phase is the mass-weighted mean of the components’ values. — Published required-HLB values for the same oil differ between sources, often by a point or more, and depend on whether the emulsion is oil-in-water or water-in-oil. Treat a match as a starting formulation, not a specification.
• Working convention: an emulsifier blend within about ±1 HLB unit of the oil phase’s requirement is treated as matched, since that is the width of the disagreement between published tables for a single oil. — A convention of the craft, not a measured threshold.