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Why are national flags rarely purple?
Although each country's flag has different colors and shapes, you will hardly find any place that uses purple flags.
Dye
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Topic archive
Articles about Dye
47 published items.
Animal world
Strange bird species specializes in eating bones and 'bathing in iron'
Large in size, the bearded vulture impresses with its ability to eat bones and its red feathers from bathing in iron-rich mud streams.
Archeology
Found a 2,000-year-old block of dye that was once more expensive than gold
The Tyrian purple dye block from Roman Britain was produced from large quantities of sea snails, which may have been used for frescoes.
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Discover the surprises on the national flag, which color is used the most?
The most used color has a ratio of 30.3%, while the least used color only appears on only 2 flags.
History
Interesting history of tie-dye (tie-dye)
Tie-dye is dyeing by tying each part of the fabric so that the color does not bleed.
New technology
Nano sponge on graphene helps effectively filter industrial wastewater
Engineers at the University of Vienna have developed a new composite material that creates an effective filter for removing organic pollutants from water.
Science story
Strange purple dye 'more expensive than gold' from sea snails
A Tunisian history enthusiast has tried to recreate making dye from sea snails that was once only used by members of the ancient royal family, the elite.
Health
Dyeing and straightening can cause breast cancer
Hair straightening increases the risk of breast cancer by 30% for all skin types, hair dyeing increases the risk for black women by 60%.
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Why do Japanese women dye black teeth?
In ancient times, black teeth were considered a symbol of female beauty, popular among women of all social strata for centuries. In Japan, the practice of dyeing black t…
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10 unbelievable monstrous things that ancient people once considered normal in the past
Let's review the facts that not everyone knows about ancient people, make sure you have to say it
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Very few countries have purple flags and the truth is this
Today, there are 196 countries in the world with 196 distinct national flags. But there is one thing quite special about them - that is almost no flag is purple.
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Chemical components of blue ballpoint pen ink
Blue ball pen ink includes dye, fatty acid and alcohol to ensure uniform ink, quick drying and paper sticking.
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Golden hair dyeing technology
Recently, for the first time, scientists have found a way to use one of the most valuable metals to dye human hair, promising to give precious metal lovers a pure gold h…
Archeology
Americans use the earliest dye in the world
George Washington University has discovered cloths using the 6,200-year-old indigo dye when excavating the ancient ritual of Huaca Prieta in northern Peru in 2007.