Technical information

Types of tiles

All the ceramic tiles produced by Zorka Keramika comply with the European standard EN 14411:2005.

Glazed wall tiles and glazed wall decorations with water absorption E > 10 % - Group B III, with parameters conforming to EN 14411:2005, Annex L. These tiles are designed for tiling wall interiors with temperatures above 0°C, the tiles are not frost proof.

Glazed tiles and glazed fl oor decorations with water absorption E < 0.5 % = Gres Porcellanato Smaltato - Group B Ia, with parameters conforming to EN 14411:2005, Annex G. These tiles are designed for interior and exterior tiling in residential housing and public utility buildings. The tiles are characterized by low water absorption, high resistance to bending, high hardness and resistance to abrasion. All the fl oor tiles produced by Zorka Keramika are of the Gres Porcellanato type.

Glazed tiles and glazed fl oor decorations with water absorption E < 3 % - Group B Ib, with parameters conforming to EN 14411:2005, Annex H. These tiles are designed only for interior fl oor tiling and in the assortment of Zorka Keramika they have been superseded by the all-purpose Gres Porcellanato type since early 2009.

Critical technical properties of ceramic tiles

Water absorption and frost resistance

Water absorption is the most important property for selecting the appropriate tile for a particular application, especially in wet environments or in areas subject to freeze/thaw cycles. Generally, the lower the water absorption, the higher the frost resistance, compactness and hardness of the tile.

Types of tiles as per water absorption
E > 10 %	Wall tiles "MONOPOROSA"	EN 14 411 L, B lIl GL, Aneks GL	Only for interior walls
0.5 < E ≤ 3 % *	Glazed tiles "MONOCOTURA"	EN 14 411 H, Blb GL, Aneks H	Universal use for tiling interior horizontal and vertical areas and exterior vertical walls
E ≤ 0.5 %	Fully vitrified tiles "GRES PORCELLANATO"	EN 14 411 G, BIa GL, Aneks G i UGL	Highly resistant tiles, frost resistant fl oors in exteriors and interiors, facades, balconies, terraces

*) Not in the production of Zorka Keramika since early 2009. All the floor tiles currently produced are the Gres Porcellanato type.

Abrasion resistance (PEI)

The abrasion resistance of glazed tiles is one of the decision-making parameters for the choice of an appropriate tile. Abrasion resistance marks the resistance of the tile surface to mechanical wear and tear. The higher the mechanical and pollution exposure of the fl oor and pedestrian traffic, the higher abrasion resistance is desired. Particularly hard dirt particles from streets or gardens gradually abrade the surface of tiles and irreversible changes in their appearance may occur. The standard EN ISO 10545-7 classifi es abrasion resistance with classes/degrees from 0 to 5.

PEI classification and recommended application
PEI 0	Not recommended for floors at all	interior vertical tiling, non-trafficable areas
PEI 1	Light duty floor with rare traffic without risk of scratching	interior vertical tiling, bedrooms, soft sole shoes
PEI 2	Light duty floor with rare traffic and small pollution	interiors of flats not directly connected to the outside areas
PEI 3	Medium duty floors with moderate pollution	interiors of family houses, hotel rooms etc. not directly connected to the outside areas
PEI 4	Heavy duty floors with busy traffic and higher pollution	interiors of offices, hotels, shops in shopping malls, entrance areas of family houses, balconies, terraces, less exposed exteriors
PEI 5	Extra heavy duty floors with high exposition to abrasion	interriors and entrances of shops, restaurants, public buildings, staircases, exteriors

The information about abrasion resistance is indicated next to the floor tile picture.

Slip resistance

For some areas, the safety consideration is even more critical than for others. There is a responsibility for stakeholders involved in specifying fl ooring products (manufacturers, architects, distributors, installers etc.) to ensure that the surfaces are fi t for the purpose and do not pose a safety risk for the users.

There is no uniform testing method in the EU and there are diff erent requirements defi ned for anti-slip tile surfaces for areas walked on when wearing shoes (DIN 51 130) or when barefoot (DIN 51 097). Both tests are done on an inclined plane.

commercial and industrial areas – DIN 51 130
group	angle of inclination	friction grade	application
R 9	> 6° – 10°	low	house entrances, hospitals etc.
R 10	> 10° – 19°	normal	stores, workshops, small kitchens
R 11	> 19° – 27°	increased	kitchens, laundries, workshops with wet surface
R 12	> 27° – 35°	high	large kitchens, dairies etc.
R 13	> 35°	very high	fat refineries, butcheries etc.

barefoot areas – DIN 51 097
group	angle of inclination	friction grade	application
A	≥ 12°	low	dressing rooms, pools with min 80 cm water
B	≥ 18°	normal	saunas, pools
C	≥ 24°	high	steps under the water, pool edges etc.

For such special applications, e.g. high-traffic halls, entrances, industrial areas, kitchens, workshops, wellness areas etc. Zorka Keramika has developed some products fulfi lling the above-mentioned requirements as follows:

series	DIN 51 130	DIN 51 097	series	DIN 51 130	DIN 51 097
WAVES	R 10	not tested	ANA GREY	R 10	not tested
KELT	R 10	not tested	ANA COTTO	R 11	not tested
CRYSTAL	R 10	B	ANA TERRA	R 11	not tested
ANA RED	R 10	not tested	KD	R 12	C
ANA SAND	R 10	not tested	MATTINA	not tested	A
PUBLIC	R 10	A

If the color is not explicitly stated the anti-slip value is valid for all the colors of the respective series. The certificate proving the above values can be found in the chapter titled Certificates.
Please note that the anti-slip surface of products results in a more demanding cleaning of the tiles.

Product identification on the boxes

The tiles are packed in carton boxes. The first class is marked as follows:

ASSORTMENT	QUALITY	SHADE	CALIBER W=	CONTROL NUMBER
IRA BLUE LIGHT	I	FS	1	1907100634

Name of item/design
Corresponds to the name stated in the catalogue.

Quality
Usually 1 choice = 1, standard choice = SD

Color shade / version
This is an immanent and typical attribute of all ceramic tiles. During the fi ring process more versions may occur - the color may range in intensity, shade and surface texture, however the character of the design must be preserved.
Please observe - wall tiles, fl oor tiles and decors produced by modern rotocolor technology may show slight diff erences in pattern, color shade and intensity that are desirable and characteristic for a particular design.
In order to get the best eff ect, only one color shade must be used on the same area. Shade identifi cation is applied mostly only for the 1st class products.

Calibre
The number describing the dimension group of a tile within the dimensional tolerance given by the standard. In order to get the best eff ect, only one shade must be used on the same area.
Calibre identifi cation is mostly applied only for the 1st class products.

Control number
A number enabling production identification. This information is essential in the event of any claims.

When tiling, it is strictly recommended to use only tiles in one shade and in the same calibre for the same area. Prior to tiling an opening and mixing the tiles from diff erent boxes is recommended.

Product identification on the pallets

Boxes are loaded on one-way pallets in dimensions of 120 x 80 cm with a label as follows:

Logistics data

	dimensions in cm	pieces / box	m² / box	kg box	boxes / pallet	m² / pallet	net weight kg / pallet	gross weight kg / pallet *
FT	10 x 20 x 1,3	18	0,36	10,1	120	43,2	1210	1230
FT	18,6 x 46,5 x 0,9	12	1,03	18,6	51	52,53	950	970
WT	20 x 50 x 0,9	10	1,00	15,3	72	72	1100	1120
WT	25 x 40 x 0,8	10	1,00	14,6	72	72	1050	1070
FT	30 x 30 x 0,8	17	1,53	25,8	40	61,2	1030	1050
FT	33 x 33 x 0,8	14	1,52	26,5	42	63,84	1115	1135
FT	40 x 40 x 0,9	10	1,60	34,8	24	38,4	835	855
FT	45 x 45 x 0,9	7	1,40	25,4	26	36,4	660	680

* incl. weight of a wooden pallet

The packing data for decors - listels, insertos and cut pieces - are always shown below the picture of the decor directly in the catalogue.