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AGS Chemical cleaning of unprotected surfaces
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Another area of application of the AGS® system is removal of graffiti from previously unprotected surfaces.
Chemical removal of graffiti consists in covering the contaminated surface with a special AGS® preparation and then rinsing with hot water under pressure.. The AGS® preparations feature an extended reaction time, therefore it is possible to remove graffiti in a way which does not disturb the surface on which it was painted. The gel-like consistence makes it possible to apply the preparation on vertical surfaces without the risk of flowing down or premature evaporation.
Chemical removal of graffiti is divided into the following groups:
- From hard, non-absorbing surfaces such as marble, granite, clinker, glass, industrially painted surfaces, such as railway cars, buses, bus-stop canopies, telephone booths etc. The cleaning process of this type of surfaces is relatively simple and the results are satisfactory.
- From smooth, delicate surfaces, such as plexiglass, laminates, road signs and billboards etc. In most cases graffiti removal does not cause any problems.
- From porous, absorbing and delicate surfaces, such as sandstone, limestone, different types of plasters finished with facade paints etc.
Removal of graffiti on these surfaces more complex and requires special care and well-measured actions. When preparations are used properly by an experienced contractor, it is possible to completely remove contamination without disturbing the cleaned material.
Additional features of the preparation:
- They are safe for the user and for the environment – all of them received certificates and positive opinion concerning their environmental impact, based on the research carried out by a Danish laboratory using the ODCE 302B method in the HEDESELSKAPET test, representing the most rigorous requirements in this respect. The effluent generated by the cleaning process need not be treated and can flow off directly into the sewer.
- They are safe for the cleaned materials - the chemical compounds used in the preparations eliminate or reduce the undesirable chemical reactions with the cleaned surfaces, and so they can be used delicate, costly materials, including sites of historical value. Due to the extended reaction time of the preparation, a skilled contractor can achieve a complete success without damaging the cleaned material.
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