What is the aging of brass?

Changes over time are also called "aging" and occur when the surface of brass oxidizes.

When it comes in contact with human hands or air, the surface gradually changes to a deeper color due to oxidation. Aging of brass refers to the change in surface color due to this oxidation. The color slowly changes over time when it comes into contact with the air or people's hands, starting out as a golden yellow like yellow gold, then turning into a candy color, then changing to a deep brown, and finally turning into an ink color. It will turn black.

One of the reasons why brass has been loved is not only because you can enjoy the change in color, but also because it develops a soft and unique texture over the years of use.

Reasons why patina occurs

Although brass is resistant to corrosion, it can develop a greenish rust called rokusho due to the effects of sweat and moisture. This is copper rust that occurs when the copper contained in brass oxidizes. In particular, brass accessories and tableware often come into direct contact with sweat and moisture, so they often develop a patina after use.

If you wear brass products such as accessories, the color may reflect on your skin or clothes, so we recommend cleaning them as soon as possible. The patina itself is non-toxic and harmless, but cutlery and tableware are meant to be put directly into the mouth, so please be careful how you store them and clean them immediately if patina appears.

Also, be careful when using it with highly acidic foods, tea, coffee, etc. as it may cause discoloration.

As mentioned above, brass is sensitive to moisture, so be sure to wipe brass accessories, tableware, and cutlery frequently to remove moisture. Also, when storing it, we recommend storing it in a zippered bag to prevent air from coming into contact with it, and storing it in a dry place.

The patina that forms on brass has little effect on the human body, but it is difficult to remove if it transfers to clothing, so we recommend cleaning it as soon as possible. In addition to polishing using a special cream, you can also easily remove blackheads using vinegar, citric acid, or baking soda.