Weiß ich nicht gleich weiß. Das gilt für Autolacke, aber auch für die Beschichtung von Waschmaschinen und anderen Haushaltsgeräten mit Pulverlack von Wörwag.

Some like it white

White Powder

Powder coatings for white goods such as washing machines or refrigerators are mass products. But Wörwag manages to stand out from the crowd with tailored solutions. As the photos of the white rooms show, it can all get quite colourful in the end.

It is hard to discover new aspects of the colour white. Especially if you are intensely involved with it on a daily basis. Still, the six co-workers are amazed when they enter the warehouse in Zuffenhausen. Where sacks of white pigments and semi-finished products used to be stored waiting for further processing, the paint experts now encounter an entirely white microcosm. Welcome to Wörwag’s kitchen studio. Three by four meters (ten by thirteen feet) with an two meters sixty (eightfoot) high ceiling. It’s a room that has been transformed into a stage setting after four days of work, and is now ready for an unusual photo shoot.

Thirty spray cans and twenty liters (5.2 gallons) of paint were needed to reinvent the room with its one hundred everyday objects—from the cutlery and the ladle to the fruit basket, from the half-eaten piece of bread to the pizza and the watering can. Even the curtains, carpet and plants radiate “whiteness”. And the already white goods—the washing machine, dishwasher, refrigerator, microwave oven and radiator—all received a fresh coat of paint for the shoot. They are all wearing all-white clothing. Now the effect is perfect. White, wherever you look.

White overload

“I like white,” says Sonja Cramer, who works at Wörwag in the customer lab for indoor powder coatings. “But I’ve never experienced it like this. I guess I didn’t even imagine it like this either. It’s really cool.” Her colleague Annett Schräpler is enthusiastic: “I’m excited to be participating. In many ways, this is art!” Even if the participants work with this decidedly colourful shade of paint on a daily basis, a total immersion in a white dream world is refreshing. White goods play a major role at Wörwag.

White goods play a major role at Wörwag. The powder coating required for this is produced at the plant in Renningen. But not all white is the same. And Wörwag white is particularly strong. Because here, too, quality is crucial. If, for example, hot grease is spilled on a white-coated surface in the kitchen, it is very likely to be discolored yellow afterwards. Normally. The lacquer products from Wörwag are much more robust and resistant. White remains white even in this case.

Symbol of purity

In the white room, Thorsten Bollinger, Director Sales Business Unit Industrial Coatings, stands beside the washing machine. For five years, the trained industrial mechanic and master craftsman has been responsible for household goods and building equipment— a market that is predominantly white. After all, the colour conveys purity and cleanliness. In addition to kitchen appliances, there are radiators and boilers. “White is not just a consistent long-term trend, it’s the easiest solution. Because it is neutral,” explains the 48-year-old. In addition, it’s a cost saving solution.

Colour finishes are more expensive, as the plastic parts in the respective colours have to be manufactured. On the other hand with white you can produce large numbers and just paint them white. Furthermore, paint shops need to be converted to multicolour operation in the case of goods in different colours.

Although white powder coating is a mass product, the demands are high and vary according to the user and product.

The paint of a washing machine must be resistant to soapy water, for whereas radiator paint has to to be resistant to yellowing. Stove tops and ovens need to withstand hot fat. Premium manufacturers such as Miele also require additional stress testing. For example, we test to see how many times a plastic laundry basket can scrape the machine front below the drum door before you see any marks. Or, how often can the zipper of a pair of jeans scratch the paint while loading? The number of mini-impacts like that add up over a projected working life of fifteen years.

Testing such requirements are everyday work in our laboratory. “Larger customers, especially, want a quality supplier who is able to adapt the coat to their needs,” says Regina Neubauer. Stefan Lutzei, a lab technician, knows what that means in practice. He and his colleagues regularly receive plastic or metal templates and have to produce a powder coat to match.

“Either we develop a completely new shade or modify one for the customer,” says Lutzei. The devil is in the details. Lutzeis colleague Cramer explains: “Among other things, it depends on the processing done by the customer. We have to modify the powder coatings to match the type of furnace.” Electric and gas furnaces may well yield different results. Once you have mastered the method, powder coatings prove to be highly efficient and environmentally friendly.

White-wise by experience

At Wörwag, white goods have a long tradition. BSH (Bosch Siemens Household goods) in Traunreut has depended on Wörwag paint since their early days as Siemens Electrical Appliances AG in the late fifties. Wörwag powder coatings have been used for white parts produced by a BSH supplier since 1980. And since 1998, BSH has been a direct customer.

Today Wörwag powder coatings are used in BSH plants in Turkey, Greece, China and Spain. An important customer is the Liebherr company, which has been using Wörwag products in its plants in Ochsenhausen (Germany) and Lienz (Austria) for 35 years. Wörwag provides the typical Liebherr White with a customized polyester epoxy powder coating.

Production in a multi-shift operation

A specially designed powder coat with an extremely robust polyurethane resin surface has contributed to the success of the brand for twelve years. Several thousand tons of powder coating leave the plant each year. White is often produced in large batches of up to 30 tons at a time. “We produce them in a multi-shift operation,” explains Alberto Elliott from the powder factory Renningen. “The quality still has to be right even with large quantities. Therefore, there are constant checks during production.”

The Wörwag colleagues love white, but are sometimes glad that there are other colours. Cramer: “Developing a red or blue, is of course a welcome change once in a while,” Lutzei agrees. He recently used the label of a beer bottle as a reference to develop a green refrigerator. And since the employees of a paint factory must have strong colour preferences by default, the end of the photo session turned into a very colourful affair.

(This article first appeared in the Wörwag customer magazine finish in 2015.)

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