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Captive Head-Washing

BlueVac Captive Head-Washing System

Salt reduction / desalination of the masonry

The principle of the Captive Head-Washing system is a combination of a targeted water whirl, which produces a rinse action, together with a simultaneous vacuum action to remove dissolved or loose residue from the substrate. The system can also be used to rinse off bacteria (mould), low & high pH detergents, oils, fire damage soot and other contaminations from all washable surfaces including fibres (carpets). This patented system awarded Gold Medals at International Inventor’s in Geneva, Basle (Switzerland) and New York (USA).

Captive Head-Washing System is an alternative to the poultice system of desalination without increasing the water load in the substrate and without waiting days or weeks to produce a result. BlueVac has an instant result.

Test Samples have been conducted and the results are

A: Dry surface (without pre-wetting) with captive head-wash procedure.

B: By Pre-wetting the area with de-ionised, demineralised or distilled water to mobilise salt ions. Then next day using the captive head-wash procedure to extract the salts.

Results

In combination de-ionised pre-wetting and captive wash head procedure a significant salt reduction has been recorded not just on the surface but up to a depth of 15cm. In this statement it is to say that it has not been a relocation of salts into depth.

The highest salt reduction is noted in the first cm, and then towards deeper ground the effect becomes less. The effect with captive wash head is compatible with traditional poulticing procedures.

In the case of not pre-wetting the surface the effect of a salt reduction is less significant.

With the captive wash head procedure, as a purely cleaning action to remove residue of a poultice or laminate, the humidity of substrate has not risen, that means the negative pressure (vacuum) of the wash head is bigger than the capillary effect of the substrate.

See also our blog

Download PDF Lab Test Result

Lab Test Result

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