Inco presents new black ink for polished tiles

At Cersaie, Inco is presenting a new high-performance black ceramic ink which avoids the formation of micro-pinholes on polished surfaces.

Lapped ceramic surfaces are smooth and glossy. This finish is achieved using a mechanical polishing process which eliminates surface porosity and gives the surface a uniform, elegant appearance.

Lapped ceramic surfaces have a number of advantages, including ease of maintenance, as they can be cleaned with just a damp cloth and a neutral detergent; a high level of hygiene, as they do not trap dirt or bacteria; and a glossy, mirror-like finish that brings elegance and sophistication to any interior.

At the same time, however, lapped ceramic surfaces are susceptible to the formation of micro-pinholes. One of the most frequent causes of this is the presence of raw materials in the body that degas during firing, releasing gases that subsequently become trapped in the glaze layer.

When the surface glaze layer is removed during the lapping process, small crater-like micro-pinholes are formed on the tile surface. These micro-pinholes are not only unsightly, but they can also harbour dirt and bacteria.

The occurrence of micro-pinholes during the firing process is often linked to specific types of ceramic inks. This problem can arise because of the type of pigments and organic compounds used in these inks, as well as the application of large quantities of product. Notably, black-coloured ceramic inks, especially when used in substantial quantities for creating large marble-effect slabs, are among the materials most commonly associated with the occurrence of the micro-pinhole defect.

To solve this problem, Inco has developed a new, high-performance black ceramic ink which entirely eliminates the production of micro-gases during firing and consequently avoids the formation of micro-pinholes. This ink is formulated with a new solvent phase and a new black pigment with a stable crystalline structure that also results in an intense, neutral colour.

In addition to eliminating micro-pinholes, the new solvent phase is designed to produce a “High Solids” ink with a high percentage of inorganic material, thereby reducing unpleasant odours and flue gas emissions.

Inco’s new high-performance black ceramic ink is particularly well-suited for lapped ceramic surfaces because it not only preserves their aesthetic appeal over time but also enhances their overall quality and appearance.