Demineralization is often a term used interchangeably with deionization. Demineralization is essentially removing all the minerals that can be found in water. This process is usually done when the water is to be used for chemicals processes and the minerals present may interfere with the other chemicals. For eg. all chemistic and beauty products have to be made with demineralized water for this reason. With the demineralization process, the water is "softened" replacing the undesired minerals with different salts (NaCl). Demineralized water has a higher conductivity than deionized water.