Bacteriostatic Surfaces


Improving people’s quality of life is important to us, and it is for this reason that we have developed NANOSILVER AG®.

The bacteriostatic additive NANOSILVER AG® is a colloidal dispersion of silver nanoparticles, which creates an antibacterial effect on ceramic surfaces treated and that provides permanent bacteriostatic and hygienic properties to the glazed surface. The presence of colloidal silver inhibits bacterial growth, both in the ground liquid enamel and in the final piece after firing or curing.

NANOSILVER AG® gives ceramic surfaces a permanent antimicrobial effect, or what is the same, a product that inhibits 99% of the growth of microorganisms and especially pathogenic microorganisms, such as bacteria and fungi. In this way, unique and exclusive pieces can be created that will give added value to ceramic finishes.

NANOSILVER AG® is a cost-effective solution suitable for all types of enamels that will maintain the original tonality and design of the ceramic finish. At Aditivos Cerámicos S.L. we are always committed to innovation, it is in our DNA, and in these times of special circumstances we have not stopped working on it, adapting to the #newnormality is the best way to maintain our commitment to care for and protect both ourselves and our customers.


The silver effect can be appreciated in the following pictures:

Silver treatment leads to dehydration of microbial cells. Silver nanoparticles and Ag+ ions released on their surface destroy sulfur -and phosphorus- containing compounds, such as DNA and proteins of pathogens. This damages the cell membrane and protein functions leading to cell death and destruction of the pathogen.


The bacteriostatic additive NANOSILVER AG® it is added to the glaze in an average proportion of 0.2% on dry glaze. This product has no effect on the rheology of the glaze and does not create any type of problem such as bubbles, application or any other effect.

Adding this product has no effect on the shades: the product will remain transparent and the finished product will not undergo any change.


The most common method for determining the bacteriostatic effect of surfaces is JIS Z 2801 (japanese industrial standard). This is the method followed by certified laboratories.

Efficiency values are given depending on CFU (colony forming units) of the agar plates. The CFU values are related to the remaining bacteria that survived on the tile surface. After being transferred to the plate, the bacteria begin to develop into colonies (yellow circles on the agar gel material).


Following the method, after preparing the ceramic pieces, the antibacterial effect is tested by inoculating bacteria on the surface of the tile. The surviving bacteria are then transferred to an agarose plate culture. In this plate, the surviving bacteria can easily grow under optimal conditions of humidity and temperature.

After allowing the surviving bacteria to grow, the colony forming units are measured to see how well the bacteria can survive on the surface. This is an example when treating a surface with

The agar plate on the left is from the UNTREATED tile (as a control), the plate on the right is from the treated plate.

The number of c.f.u is higher in the left plate (there are many bacteria) than in the right plate (no surviving bacteria). NANOSILVER AG® has a very high efficiency as an antibacterial protection on ceramic tiles.


The silver nanoparticles are obtained from a green synthesis, more respectful with the environment, in which the use of chemical agents associated with environmental toxicity is reduced.


– Non-allergenic and non-toxic.

– Nanoparticle size range between 5 and 20nm, with 99% smaller than 15nm.

– Thermal stability above 1300ºC.

– Stable to UV light, and lasts on the support.

– Resistance to abrasion and deep cleaning.


– NATURE: Dispersion of encapsulated silver nanoparticles.

– APPEARANCE: Amber-brown liquid.

– SOLUBILITY: Completely soluble in water.

– APROX. DENSITY: 1.056 g/cc.


With dosages of 0.2%  NANOSILVER AG® on the dry weight of the glaze, 99.9% bacteriostatic activity efficiencies are achieved against micro-organisms such as Escherichia Coli CECT 434 or Staphylococcus aureus CECT 239 according to JIS Z standards 2801:2010 or ISO 22196:2011. They also have a fungicidal effect. It is recommended to carry out previous tests at different doses depending on the nature of the glaze, porosity and final use of the treated piece.


*R according to JIS Z 2801:2010


– NANOSILVER AG® has an antimicrobial effect and generates a reduction in the tested bacteria content of more than 99%.

– The reduction in bacterial activity is quantified and demonstrated in all the treated pieces.



Multiple products are often used in production processes and this can make it difficult to identify which additives have been added at each stage.

Adding NANOSILVER AG® does not cause any visible effect on the enamels that reflects that it is already part of the mixture.

For this reason, at Aditivos Cerámicos we wanted to facilitate this process by creating a new product called NANOSILVER BLUE®, that incorporates blue aniline for the marking of already treated enamels. In this way, it is possible to distinguish in the same production line the products that have been treated with the germicide.

NANOSILVER BLUE® has the same antibacterial efficacy as NANOSILVER AG® and its color disappears permanently during the curing of the pieces.


*R according to JIS Z 2801:2010


– NANOSILVER BLUE® has an antimicrobial effect and generates a reduction in the tested bacteria content of more than 99%.

– The reduction in bacterial activity is quantified and demonstrated in all the treated pieces.

The calm of a safe environment with NANOSILVER AG®.


*NANOSILVER AG® is a registered trademark under the intellectual property law of the European Union.

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