Ecological material of lasting value
Premium enamel
Enamel is glass fused to steel in the furnace, forming an inseparable bond.
Only natural raw materials are used in the production of our porcelain enamel products. Quartz, clay, feldspar, soda and potash are melted together to form glass. The molten mass then solidifies, creating what are known as enamel frits. These are finely ground with water in a ball mill to produce what is called enamel slip, which can be made in almost any colour.
The deep-drawn or pressed raw material is dipped into the enamel slip or sprayed on manually. After drying, the enamel and steel are fused together in the furnace at 850 °C to form a composite material.
Only natural raw materials are used, which makes porcelain enamelware 100% recyclable as scrap metal. The firing process creates the beautifully radiant colours, as well as the hard, non-porous, scratch- and cut-resistant surface.
At every stage of production, the strict quality standards of the European Enamel Authority are adhered to.
10 good reasons for RIESS premium porcelain enamel
- CO₂-neutrally produced in Austria
- Suitable for induction and all types of cooker
- Cut and scratch-resistant
- Easy to clean and naturally bacteria-inhibiting
- Healthier and more energy-efficient cooking
- Flavour neutral
- Heat-resistant enamel surface up to 450°C
– optimal operating temperature 220°C - Long-lasting with proper use and care
- Available in many colours and designs
- Recyclable as scrap metal
How a RIESS product is made
Step 1
Cutting or stamping of metal discs
Step 2
Deep-drawing of the sheet metal disc
Step 3
Welding on the handles
Step 4
Punching the holes
Step 5
Degreasing before enamelling
Step 6
Grinding the glass frits in the mill
Step 7
Applying the enamel slip
Step 7
Manual dipping
Step 7
Enamelling by spraying technique
Step 8
Transfer station of the drying oven
Step 9
Applying the RIESS quality seal
Step 10
Applying the design
Step 11
Firing at 850 °C
Step 12
Quality control & packaging
Guided tour through the manufactory
With prior registration, we offer free factory tours for groups of 10 people or more, followed by a visit to our factory outlet store.
The origins of enamel
Enamel was highly valued in many cultures for jewellery and decorative crafts. The earliest finds of enamel as grave goods in Mycenae date back 3,500 years. Carl Peter Fabergé used enamel to decorate his famous Easter eggs made of precious materials, created between 1885 and 1917 for the Russian tsars.
In the early days of enamelling, the use of lead was technically necessary to bond the glass to the base material. In the 19th century, doctor Adolf Pleischl played a key role in developing production processes that for the first time made it possible to create enamel without harmful lead. He was a pioneer in producing durable, healthy enamel cookware that was not only aesthetically pleasing but also bacteria-inhibiting, aroma-preserving and easy to clean.
" […] It is generally recognised that the vessels in which food and drink are prepared or stored have a significant influence on the quality of these foods — whether good or bad — so that even the mildest food, when prepared or stored in a poor vessel, can become a potent poison. […]"Dr. Adolf Pleischl, Chemist & medical doctor, 1862
Today, enamelled contact surfaces that come into contact with food during cooking must meet very high standards. These are regulated by the following directives: (EC) 1935/2004, (EC) No. 2023/2006, EN ISO 4531:2022, and the Austrian Ceramic Regulation BGBL. No. 259/2006.