# History of Ink
## Ancient Origins
- **40,000 BCE**: Earliest known pigments used by humans in cave paintings
- **2500 BCE**: Ancient Egyptians develop ink made from vegetable gum, soot, and water
- **400 BCE**: Chinese invent India ink using lampblack and animal glue
## Medieval Period
- **5th-15th centuries**: Iron gall ink becomes widely used in Europe
- **12th century**: Introduction of ink made from oak galls and iron salts
## Modern Era
- **1772**: First patent for ink granted in England
- **1830s**: Introduction of dye-based inks
- **1856**: Synthetic aniline dyes invented, revolutionizing ink production
## 20th Century
- **1930s**: Ballpoint pen ink developed
- **1960s**: Felt-tip pen inks introduced
- **1970s**: Water-based inks gain popularity due to environmental concerns
## Digital Age
- **1980s**: Inkjet printer technology becomes commercially available
- **1990s-present**: Continued improvements in digital printing inks
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