Nowadays, almost every household has a dishwasher. Compared to washing dishes in the sink, the dishes in the dishwasher are exposed to higher temperatures and more aggressive detergents. This results in higher thermal, mechanical, and especially chemical stress on the dishes.

Since this is always an important topic for our customers, we would like to briefly and clearly explain how our print behaves in the dishwasher.

Our porcelain products are fired at around 850°C. At these high temperatures, the ceramic colors fuse with the glaze of the items.

If you were to look at it under a microscope, you would see that the ceramic color particles sink into the glaze. As a result, they are surrounded by the glaze like a protective layer. This then protects the colors from external influences.

For this reason, our print on porcelain is:
- scratch-resistant
- 100% dishwasher safe
- microwave and oven safe 

Limitations: Metallic and precious metal decorations may have limited dishwasher suitability or may not be microwave-safe.

Unlike porcelain products, glass items cannot be fired at such high temperatures, as the glass would melt. We fire our glass items at around 630°C to 660°C.

At these lower temperatures, the fusion between the color and the glass layer mentioned above is not as strong, or in other words: the color particles do not sink as deeply into the top glass layer.  As a result, the protection against external influences is also less pronounced. 

For this reason, our print on glass is:
- scratch-resistant
- only partially dishwasher safe (see note below)
- microwave safe

Note: Especially private dishwashers with their aggressive alkaline solutions and typically very long washing cycles cause the glass colors to fade very quickly. Industrial dishwashers, which are often used in the hospitality industry, are less of an issue as they primarily use heat & pressure, and the wash cycles are significantly shorter. This has little effect on the glass colors.

The colors used here are made from organic materials that cure at just 200°C. There is no fusion with the carrier material. This process can be applied to all the materials we offer, whether stoneware, glass, or porcelain. This also includes the Hydroglasur.

The biggest advantage of the low-temperature firing: The color possibilities are virtually identical to screen printing on paper. Unlike ceramic colors, "critical" tones such as pure magenta or cyan can also be implemented. Even light colors and designs on darker materials are possible and offer convincing color brilliance through prior underprinting in white.

For this reason, our low-temperature print is:
- not scratch-resistant (can be damaged by sharp objects).
- 100% dishwasher safe
- not microwave or oven safe

If you have any further questions about this topic, please contact us, we will be happy to assist you.

Your Granvogl Team