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A process for producing an intermediate emulsion comprising an oxidizer solution, fuel and emulsifier, which process comprises the steps of: (a) mixing in a micromixer an oxidizer solution with a fuel blend comprising a fuel and an emulsifier so as to solubilize a portion of the oxidizer solution in

A process for producing an intermediate emulsion comprising an oxidizer solution, fuel and emulsifier, which process comprises the steps of: (a) mixing in a micromixer an oxidizer solution with a fuel blend comprising a fuel and an emulsifier so as to solubilize a portion of the oxidizer solution in the fuel blend to produce a precursor product; (b) mixing the precursor product obtained in step (a) using a micromixer in one or more successive stages in order to form the intermediate emulsion.

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1. A process for producing an intermediate emulsion comprising an oxidizer solution, fuel and emulsifier, which comprises the steps of: (a) mixing in a micromixer an oxidizer solution with a fuel blend comprising a fuel and an emulsifier so as to solubilise a portion of the oxidizer solution in the

1. A process for producing an intermediate emulsion comprising an oxidizer solution, fuel and emulsifier, which comprises the steps of: (a) mixing in a micromixer an oxidizer solution with a fuel blend comprising a fuel and an emulsifier so as to solubilise a portion of the oxidizer solution in the fuel blend to produce a precursor product;(b) mixing the precursor product obtained in step (a) using a micromixer in one or more successive stages in order to form the intermediate emulsion, wherein the output of each stage of mixing, and the process as a whole, is 50 to 125 ml/min. 2. The process of claim 1, wherein the dispersed oxidizer phase is selected to control the inherent sensitivity of the intermediate emulsion. 3. The process of claim 1, wherein the residence time for the entire process is from 20 to 100 milliseconds. 4. The process of claim 1, wherein the pressure drop over the process as a whole is less than 20 bar. 5. The process of claim 1, wherein the volume supply rates for the aqueous oxidizer solution and fuel blend respectively are 10 to 250 ml/min and 0.5 to 25 ml/min. 6. The process of claim 1, wherein the intermediate emulsion has a viscosity of at least 6,000 cP (Brookfield viscosity taken with spindle #7 at 50 rpm) at ambient temperature. 7. The process of claim 1, wherein the droplet size of the intermediate emulsion is less than 40 μm. 8. A method for the manufacture of an emulsion explosive which comprises sensitising an intermediate emulsion produced in accordance with the process of claim 1.