Cracks are small fissures that form on the surface or internal structure of the ceramic, reflecting stresses that the piece has not been able to withstand. These fractures usually appear as a consequence of too rapid cooling at the end of firing, when the temperature differences between the inside and outside of the piece, or between different areas of the piece, generate internal stresses. In addition to rapid cooling, other factors such as unbalanced compositions in the ceramic mix, poor vitrification or differences in wall thickness can also contribute to the appearance of cracks.
The impact of these cracks is not only aesthetic; cracks can weaken the structural integrity of the tile, making it more vulnerable to breakage and other damage during use or handling. Crack prevention is therefore essential to maintain the quality and durability of the final product. Careful control of the cooling cycle, with gradual and uniform temperature decreases, as well as careful selection of materials and control of wall thickness, are fundamental strategies to prevent the formation of cracks in ceramic pieces.
Interesting Fact
Cracks may be more evident in stoneware and porcelain ceramics due to their high firing temperature, where any sudden change in temperature can generate internal stresses.
Helpful Tip
If you have problems with cracks in your parts, adjust your kiln's cooling ramp, allowing the parts to cool gradually to reduce thermal stress.
