Opera Group S.r.l. - Home page

Product Regulations

Current product standards: UNI EN14411 - ISO13006

Ceramic tiles are divided into groups according to the forming method and the degree of water absorption.

• A. Extruded tiles (GL and UGL)

• B. Pressed tiles (GL and UGL)

The groups are in turn divided into subgroups, according to the degree of water absorption AA (%) (porosity):

The standards define, for each product group, the characteristics and tolerances.The tiles of the Opera Group srl range are obtained by pressing and belong to BIa and BIII groups.These standards define the methods for determining the dimensions and appearance, physical properties and chemical properties according to ISO 10545 requirements.

Porcelain stoneware: (BIa group, water absorption between 0 and 0.5%): The production process of porcelain stoneware begins with the grinding of a mix of precious raw materials (clays, sands, feldspars, kaolins) which leads to the creation of a liquid compound commonly referred to as "slip". This compound is finely atomized until it reaches a fine and homogeneous particle size powder, usually called "dough", suitable for pressing. After the formation of the tile by pressing the mixture, the subsequent firing at temperatures above 1,250 ° C allows the attainment of the greification, necessary to give the porcelain stoneware those characteristics of exceptional hardness, resistance, compactness, non-absorbency and therefore also of frost resistance which distinguish it.FINE PORCELAIN STONEWARE  - UNI EN 14411 (ISO 13006) - Bla (appendix G)         Duble firing: Double firing uses clays from local owned quarries and chamotte, dryground, mixed and pressed with hydraulic presses. The firing of the support is performed in quick cycle with roller ovens at a temperature of about 1100°. After the glazing of the biscuit the glaze is fired in single layer roller ovens at about 1030°. The resulting facing materials with a water absorption higher than 10%, classified as BIII according to standard UNI EN 14411. These types of tiles have practically no shrinkage during firing, and this dimensional consistency results in a very easy.DOUBLE FIRING - UNI EN 14411 (ISO 13006) - BIII (Appendix L)         

Product certifications

The CEN standards (Comité Européen de Normalisation)
CEN STANDARDS (Comité Européen de Normalisation) Although not legally binding, CEN EN 14411 standards are used as a reference in the event of claims and litigation. These standards are accepted by the following CEN member countries: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Norway, Netherlands, Portugal, Spain, Sweden, Switzerland, United Kingdom. Opera Group srl complies with ISO 13006 standards, which are accepted in most countries across the world Ceramic Opera Group srl  guarantees its products as complying with UNI EN 14411 – ISO 13006 standards.

MADE IN ITALYThe production of our products is entirely made in Italy, with production lines continuously renewed and expanded over time, also to guarantee a punctual compliance with current safety regulations. We write with pride "Made in Italy" on our tiles because they are synonymous with creative passion, the essential values that inspire our choices and activities every day.

MARCATURA CEThe CE mark is the safety product certification required by EU and it is finalized to preserve the people’s health and the goods in buildings.The new Regulation UE N. 305/2011 The most important news is the introduction of the Declaration Of Performance (DOP) with which the supplier communicates the safety requirements concerning own materials.

CSTB – QB UPECUPEC is a functional rating system for flooring products, which proves whether a product is suitable for use in a specific area.

CCCChina Compulsory Certification for the sales of porcelain stoneware tiles within the Chinese market. CCC certification refers to the standard requirements relevant to the safety and health of the end user and is granted exclusively by the institutes certified by the Chinese Authorities.

VOC - COVIn recent years the desire to measure the impact of products on the environment and the wellbeing of people has increased dramatically: air pollution, even in indoor environments, has become a recurring theme that all players in the construction industry have to take into consideration.A new label of environmental classification has emerged that allows being able to assess the level of air pollution of an indoor environment caused by a given product, including in particular and not only, pollutants such as Volatile Organic Compounds, or VOCs.They are basically found in solvent-based materials such as varnishes, adhesives, wood treatments, etc.

Ceramic tiles, by their very nature, do not contain any VOCs: ceramics are in fact mineral products of mineral chemistry and not of organic chemistry, and their firing at more than 1200 °C degrees guarantees the total destruction of any possible organic residue, specifically of the VOCs. For this reason ceramic tiles are always classifies as A+, since they do not release any toxic substance into the environment.


Opera Group S.r.l has fulfilled all CE Marking requirements for its products. Relevant commercial documentation is available for distributors, professionals and users on the website www.ceramicaopera.it

  Declaration of Performance - Sliperiness Table 01OPR-IT »


  Declaration of Performance - Sliperiness Table 01OPR-UK »


  Declaration of Performance - Sliperiness Table 01OPR-DE »


  Declaration of Performance - Sliperiness Table 01OPR-FR »


  Declaration of Performance - Sliperiness Table 01OPR-ES »


  Declaration of Performance - Sliperiness Table 01OPR-CZ »


  Declaration of Performance - Sliperiness Table 01OPR-HU »


  Declaration of Performance - Sliperiness Table 01OPR-SK »


  Declaration of Performance - Sliperiness Table 01OPR-PL »


  Declaration of Performance - Sliperiness Table 01OPR-NL »


  Declaration of Performance - Sliperiness Table 01OPR-SL »