Dye has been coloring our world since time began.
Clothing was dyed to give it color and definition. Artists used dye pigments to create pictures on the stone interiors of caves.
Written records of the use of dyes in China date to 2600 BCE and Alexander the Great mentions “beautiful printed cottons” found in India in his accounts of 327 BCE. By 925 CE Wool Dyers’ Guilds were first established in Germany. In 1856 the first synthetic aniline dye was discovered. During the early 1900’s RIT household Dye was formulated and brought to an eager American market. The timing was perfect since most dye had previously been imported from Germany and World War I was in full swing.
The term “Dyed in the Wool” refers to wool that is dyed before being spun into thread and/or fabric.The color when dyed this way likely to last a very long time. From this we gather the metaphorical meaning of “dyed in the wool” to be profoundly & deeply ingrained, not likely to change.