Tile Manufacturing

Ceramic tiles are engineered materials, and their performance is determined at the stage of raw material selection. Strength, porosity, dimensional stability and surface compatibility are all influenced by the composition of the body before any forming or firing takes place.

Raw materials do not simply define the starting point of manufacturing they establish how the material will behave through compaction, firing and finishing. Every variation in performance across ceramic, vitrified and porcelain tiles can be traced back to differences in material formulation.

Ceramic tile bodies are typically composed of three primary material groups, each serving a distinct function within the structure.

Clay (Kaolin and Ball Clay)

Clay forms the base of the tile body and provides plasticity during shaping.

After firing, clay contributes to the development of the ceramic matrix, influencing both strength and porosity.

Feldspar

Feldspar acts as a fluxing agent during firing.

Higher feldspar content leads to increased density and lower porosity, which is critical for vitrified and porcelain tiles.

Silica (Quartz)

Silica provides structural stability and controls thermal behaviour.

It acts as a stabilising component, ensuring dimensional accuracy and preventing deformation.

The performance of a tile is determined by the proportion of these materials.

Higher Clay Content

Higher Feldspar Content

This is essential for vitrified and porcelain tiles.

Balanced Silica Content

Different tile types are defined by how raw materials are proportioned and processed.

Ceramic Tiles

Vitrified Tiles

Porcelain Tiles

Raw materials are converted into a processable form before shaping.

Wet Milling

Spray Drying

This stage is critical for ensuring consistent behaviour during forming and firing.

The structure of the tile body is determined at the material stage.

Full Body Construction

In full body tiles, the material composition remains uniform throughout the thickness.

Used in:

Surface-Based (Glazed) Construction

In glazed tiles, the body and surface perform different roles.

This allows:

Advanced manufacturing allows variation in how materials are deposited before compaction.

Single Layer Systems

Multi-Layer Systems

Raw materials must be controlled to avoid defects during manufacturing.

Common Impurities

Quality Control Measures

These ensure predictable behaviour during forming and firing.

Material selection directly affects:

In large format slabs, material consistency becomes critical to prevent:

Firing is the stage where a shaped but fragile tile body is transformed into a durable, high-performance material.

Before firing, the tile exists as a compacted powder structure with limited strength. It is only through controlled heating that the material develops density, bonding and long-term stability.

At this stage, raw materials are no longer just mixed—they are chemically and physically transformed.

Tiles entering the kiln are referred to as green bodies.

These have:

Firing converts this unstable structure into a dense ceramic body capable of handling:

Firing is not a single step—it is a controlled sequence of thermal stages.

Initial heating removes residual moisture from the tile body.

Temperature is increased gradually to avoid internal stress.

At intermediate temperatures:

This stage prepares the body for densification without creating internal voids or defects.

This is the most critical stage of firing.

At high temperatures (typically 1100°C to 1400°C, depending on tile type):

This process is known as sintering, and when extensive, leads to vitrification.

Sintering is the process through which individual particles bond together under heat.

What Happens During Sintering

Impact on Material Properties

Sintering determines how well the tile can withstand:

Vitrification is the advanced stage of sintering where a glass-like phase develops within the material.

How Vitrification Occurs

Resulting Characteristics

Material Differences

Firing is controlled through precise temperature profiles known as firing curves.

Key Parameters

Why Control Is Critical

Improper firing can result in:

In large format slabs, temperature control becomes even more critical due to:

After peak firing, controlled cooling is essential.

Cooling Stage Functions

Impact of Improper Cooling

The firing process directly determines:

For example:

In slab manufacturing, firing precision becomes even more critical.

Challenges at Large Scale

Role of Pre-Firing Uniformity

Technologies like Continua+ ensure uniform density before firing, which leads to:

In modern tile manufacturing, the surface is not a final layer—it is a designed interface.

While the tile body provides structural strength, the surface determines how the material interacts with:

Glazing and digital printing together form a multi-layered system that defines both performance and visual outcome.

A glaze is a glass-forming coating applied to the surface of a tile and fused during firing.

It is typically composed of:

During firing, the glaze melts and bonds to the tile surface, forming a non-porous, durable layer.

Glazing performs multiple roles beyond visual enhancement.

Surface Protection

Hygiene and Maintenance

Surface Behaviour

Digital inkjet printing has transformed how tile surfaces are designed.

Unlike traditional screen printing, digital systems allow:

This enables tiles to replicate materials such as:

With a level of detail that was not previously possible.

In contemporary manufacturing, printing and glazing are not separate steps—they are layered processes.

Layered Surface System

A typical sequence may include:

This structure ensures that:

Why Layering Matters

Their combination allows tiles to achieve:

Different combinations of glaze and printing result in varied surface finishes.

Gloss Surfaces

Matte Surfaces

Structured and Textured Surfaces

Polished and High-Definition Surfaces

Single Layer Systems

Multi-Layer Systems

Used in:

The surface layer must remain compatible with the underlying body.

Thermal Compatibility

Adhesion and Bonding

Surface design must align with usage conditions.

Wall Applications

Floor Applications

High-Use Areas

While advanced, surface systems must be selected carefully.

Selection should consider:

In slabs, surface engineering becomes more critical due to scale.

This allows slabs to function in: