Golden yellow mordant for brass items. simple recipes

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FACTORY TECHNOLOGIES AT HOME - SIMPLE RECIPES
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Golden yellow mordant for brass items. Simple recipes and tips

Factory technologies - simple recipes

Directory / Factory technology at home - simple recipes

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Small brass thingssuch as buttons, clasps, buckles, etc. can be dyed golden yellow color by immersing them on a copper wire in a neutral solution of copper acetate (verdigris).

The solution must be completely neutral, i.e. do not change the colors of either red or blue litmus paper. It is neutralized, if necessary, with acetic acid.

Author: Korolev V.A.

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The international association of mobile operators GSMA shared its forecast regarding the spread of eSIM in the near future.

eSIM is becoming an increasingly common and popular solution in the world of mobile communications. GSMA forecasts indicate significant growth in eSIM usage in the coming years, which could change the face of the mobile technology market.

Despite the fact that embedded SIM cards were introduced about 10 years ago, they remained not very popular for a long time. From 2016 to 2018, they found their use mainly in smartwatches. However, smartphones are currently the main consumers of eSIM, occupying about 60% of the market.

The GSMA predicts that the number of eSIMs in use will reach 2025 billion by 1, rising to 2030 billion by 6,9, representing approximately three-quarters of all smartphone connections, according to the organization.

GSMA is paying special attention to smartphones that do not support the installation of a physical SIM card. Particularly rapid distribution of built-in SIM cards is planned in the United States, where, starting in 2022, smartphones of the famous brand are sold exclusively with eSIM.

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