What is deionised water?

What is Deionised Water?

What is deionised water
What is deionised water?

So what is deionised water? Deionisation is a method used most often by laboratories to produce purified water on demand. All naturally-occurring water sources contain dissolved mineral salts. During washing, these salts will leave unsightly spots on paint work and glass. In solution, salts separate into positively-charged cations and negatively-charged anions. Deionisation can reduce the amounts of these ions to very low levels through the process of ion exchange. Cations are removed by cation exchange resin. It replaces sodium, calcium, magnesium, and other cations with hydrogen ions (H+). This exchange produces acids which must be removed or neutralised by anion exchange resin. This is also why you must not use the system outside of its operating parameters or you could cause damage to your work surface.

Two general types of anion resin are used for deionisation: weak base resin and strong base resin. Weak base resin adsorbs strong acids, while strong base resin exchanges chloride, sulfate and alkaline anions for hydroxide ions (OH-). The hydrogen ions from the cation exchange process combine with the hydroxide ions from the anion exchange process to form water (HOH or H2O).

Because the deionisation process is so effective, the water quality is usually measured by the water’s resistance to electric current (in OHM-cm). The end result is purified water that will not leave mineral deposits – water spots – on your car or windows.

You have to see the results to believe just how effortless car/window washing will now be with a CR Spotless water system.

Have a look at some of the videos on  to see just how easy the CR Spotless DI Water System is to use, together with some of the amazing results achieved.

Why not take the hard work out of vehicle washing!