Nanorestore Paper®

Overview

Nanorestore Paper® dispersions are used for the pH control and deacidification of cellulose-based artifacts. The use of nanoparticles grants good penetration into the porous substrate, quick neutralization of the pH and the formation of an alkline buffer. These systems represent an alternative to methods that use micron-sized particles and precursors of hydroxides (or carbonates). The use of organic solvents makes Nanorestore Paper® formulations compatible with water-sensitive substrates.
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Available Formulations
Nanorestore Paper®
Ethanol 3
Calcium hydroxide nanoparticles dispersed in ethanol at a concentration of 3 g/L. These particles are specifically designed for pH control and deacidification purposes. 80 €/L
Nanorestore Paper®
Ethanol 5
Calcium hydroxide nanoparticles dispersed in ethanol at a concentration of 5 g/L. These particles are specifically designed for pH control and deacidification purposes. 100 €/L
Nanorestore Paper®
Propanol 3
Calcium hydroxide nanoparticles dispersed in 2-propanol at a concentration of 3 g/L. These particles are specifically designed for pH control and deacidification purposes. 80 €/L
Nanorestore Paper®
Propanol 5
Calcium hydroxide nanoparticles dispersed in 2-propanol at a concentration of 5 g/L. These particles are specifically designed for pH control and deacidification purposes. 100 €/L

Please, note that all the prices on the website do not include 22% VAT
Technical Information

When are they used?

Acidity affects several types of artworks, leading to their weakening. For instance, cellulose-based artifacts, such as paper, wood and canvas exhibit loss of mechanical properties due to acid hydrolysis of cellulose. It is therefore necessary to counteract acidity through the neutralization of the pH and the application of an alkaline buffer on the endangered material.

How do they work?

The particles adhere to the cellulose fibers, and neutralize acidity on site. The excess of particles reacts with CO2 in the atmosphere, turning into carbonate. It has been shown that a neutral pH also inhibits the oxidation of cellulose by iron and copper ions, as those present in the classic metal-gall inks.

How are they used?

The dispersions of nanoparticles are typically applied either by brushing, dripping or spraying over the artifact's surface, or by immersion of the artifact into the dispersion. When hydroxides are used, full carbonation takes place in 2-3 weeks, also depending on the hydrothermal conditions.

For further information, please refer to the technical sheet.

Reference textbooks



1. Piero Baglioni and David Chelazzi, Nanoscience for the Conservation of Works of Art, Royal Society of Chemistry, 2013

2. Piero Baglioni, David Chelazzi and Rodorico Giorgi, Nanotechnologies in the Conservation of Cultural Heritage: A Compendium of Materials and Techniques, Springer, 2014
For any information, please, contact us!
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Products developed within EU NANOFORART Project