Permanent coffee filters, permanent filters for coffee and tea, Swissgold filters, gold filters and seleXions gold filters as well as other product designations basically stand for filters with a metallic foil or fabric structure.
History, development of the gold filter
As an alternative to paper, a coffee filter carrier was developed in the 1970s by "Swissgold" in Switzerland, primarily to replace the paper filter bags for coffee machines. Even then, these were electroplated metal foils with fine, elongated slot openings, which were joined together in a plastic injection molding process to form a conical basket. Essentially, today such filters are still manufactured using similar production processes.
The all-metal gold filter from seleXions
The new, patented all-metal gold filter from seleXions is a further development that dispenses entirely with plastic and consists only of a single stainless steel foil with micro-openings. This filter is completely covered with an additional protective gold non-stick layer of hard titanium. This hard coating simplifies cleaning and further extends the lifetime of the all-metal gold filter.
Taste influence of the gold filter
The well-known disadvantages of paper filter bags as flavor carrier inhibitors are completely compensated by the gold filter as filter medium with the open micro-slits. Due to its closed structure and absorbency, paper removes the "brewing colloids" (natural coffee oils and fats) dissolved in the hot water, which are the flavor carriers of any coffee.
The open structure with micro-holes in the gold filter allows all these natural flavor carriers to enter the coffee unhindered. This is where the difference in tasting coffee comes from.
Meanwhile, the new all-metal gold filter is also suitable for professional coffee tasting, because this new filter, like a ceramic filter, for example, is made of a mono-material and is absolutely neutral in taste.
The cost pays off
The gold filter is more expensive to buy than paper filter bags, but you won't need paper bags for years to come. It is also easy to use and can be left in the coffee maker for storage. The coffee maker is always "ready to go" with the gold filter!
The Goldfilter is ecological and sustainable
The gold filter is a very ecological and sustainable small everyday product for the kitchen, whose value you may not recognize at first glance. In particular, the new all-metal gold filter, made from the mono-material stainless steel, is a 100% recyclable product that does not need to undergo any material separation process in recycling. It can therefore be fed into a new life cycle with the scrap iron in an iron-foundry.
The gold filter is biologically interesting
The coffee grounds, which vary from about 50 to 80 grams depending on the amount of coffee infused, should not be disregarded. The pure coffee grounds, which can be tapped out of the gold filter, should definitely be added to the compost or also mixed with the plant soil of the kitchen herbs. It is much too bad to simply dispose of this valuable organic material in the garbage bin. Coffee grounds contain a lot of natural nutrients that are very important for plant growth, e.g. substances such as potassium, calcium, magnesium, phosphorus, nitrogen, etc., which are also contained in commercial fertilizers.