How can I determine the appropriate balance of an emulsifier pair (emulsifier A and emulsifier B) in EC formulation?
The simplest approach is to prepare two samples of the test formulation (premix A and premix B). The premix should contain a member of the pair at an arbitrarily fixed quantity (usually 5% or 10%). Blends of the premixes in different ratios (0:5, 0.5:4.5, 1:4,…) are then tested preferably at practical dilutions with water of given hardness. After this initial screening is completed, more accurate ratios may be selected for optimum performance.
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