About cores Gold Filter
Gold is hard to oxidise and so coffee made with this gold filter is not affected by metal.
Also, the true taste and flavour of coffee can be extracted as the coffee oil is not blocked by the filter.
Why not enjoy great taste and flavour with the “cores” gold filter?
What are the benefits of the Gold Filter?
Pure gold double plating: One of main causes of coffee degradation is “oxidation”. Gold does not cause any chemical reaction, so the coffee brewed by a gold filter cannot be oxidised and you can enjoy great tasting coffee.
Longitudinal slots: Thanks to the slot shape water flows much smoother and faster and the water temperature can be kept higher.
Punching direction from inside to outside: Every slot is punched from inside to outside to allow water to flow much smoother and faster.
Original filter holder design: ideal shape for fast brewing
The clear filter holder has no wall. This allows the water to flow very smoothly unlike an ordinary dripper where the water has to pass than between the filter holder wall and filter.
Strong Point of Gold
Ionisation tendency of Metal
so it is better to select a hard to oxidise metal as the material of metal filter.
Gold (Au) is the hardest metal to oxidise or ionise.
- Ionisation tendency of SUS is same level as Copper (Cu).
- The passivity of Titanium (Ti) and Aluminum (Al) ensures they do not become rusty and generate only a small amount of metal ions.
“Passivity” means the property to have an oxide film that resists corrosive action on the metal surface.
*Comparison between Titanium filter and Gold filter: Per tasting test by Maruyama Coffee, the coffee liquid brewed by the Cores Gold Filter tends to be smooth and tastes good compared with that by Titanium.
Comparison with Paper Filter
In the case of a paper filter, water flows down to the bottom of the filter along the paper rather than passing through the paper.
Also the coffee oil that enhances the taste of coffee is absorbed into the paper and not extracted in the coffee liquid.
As for the gold filter, water passes easily through the filter and flows smoothly down along the outside. And, of course, coffee oil can pass through the filter.
So, you can enjoy all the original good taste and flavour of coffee with our cores gold filter.