Add "OPE" 1 to "Triton" X200, with slow stirring, then add the "Triton" AS30 and water in order indicated. Mix thoroughly to prevent separation of the shampoo on prolonged standing. This formulation is particularly effective for oily hair. For dry hair, reduce the amount of "Triton" X200 and add tallow sulfate. This will also reduce the cost of the formulation somewhat.