Most glaze or engobe production lines, the issues are actually quite consistent as below:
First, slurry instability is probably the most common complaint. Without proper rheology control, glaze slips tend to sediment, flocculate, or separate during storage and application, leading to uneven coating and poor reproducibility.
Secondly, poor adhesion and coverage. If the binder system is weak, glaze layers may show pinholes, crawling, or even partial peeling after firing — especially in fast production lines.
Another issue we often see in practice is drying-related defects — cracking, shrinkage, or surface tension problems caused by uncontrolled water evaporation.
And finally, process inconsistency: grinding efficiency, viscosity drift, and application variability all affect final product quality and scrap rate.
