On the stone surfaces tombstones and artefacts of historical-artistic interest, dirt, patina and encrustations can cause irreversible alterations ofthe original material, inevitably harmful to conservation. They can be cleaned using mechanical/physical methods or by using chemicals.
The cleaning process must be well controllable at every stage,graded and selective, and must not produce materials harmful to the preservation of the stone(e.g.: soluble salts). It also must not produce physical changes,such as microfractures or strong abrasions on the clean surface, that can accelerate deterioration by increased porosity.
Our product range includes controlled pH cleaners that ensure compliance with the material, the operator and the external environment,thanks to the biodegradable tensioactives contained within them. Neutral pH cleaners can also be used with long contact times with the wrap technique,or thickened in the gel phase, working in a gradual and more controllable way.
A special focus on detergents in the restoration range is focused on compatibility and respect for the stone materials or artefacts of historical-artistic interest and the low environmental impact.
Wet the surfaces with clean water
Apply the appropriate cleaner to the material by foaming and letting it act for the specified time
Rinse with plenty of water
Proceed to the next steps of the conservative intervention
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In case of thick and hard encrustations of dirt, smog or salts it is advisable to dry brush the surface affected by the washing with sorghum broom, in order to affect the surface patina of dirt that limits the penetration of detergents inside them.