Plants based highlighter pen (PASTERN)

Highlighter pens serve as vital tools for office and education to mark important information and concepts for memory. Most highlighter kinds use liquid ink and function similarly to felt-tip pens or markers. However, conventional highlighters may be harmful to contend with because they consist of artificial colours created chemically such as fluorescein, pyranine, triphenylmethane, rhodamine, xanthene, and coumarin. The main objective of Plants bASed highlighTER peN (PASTERN) is to create non-toxic highlighter using natural colouring that has been extracted from plant base. For the innovation development of the product: turmeric, butterfly pea flower, and coffee powder have been used as colouring agents and become excellent replacements for the toxic substances found within conventional highlighter pens. Each plant base extract's components have been identified using the retention factor (Rf) in chromatography. While butterfly pea flowers had a higher Rf value and less polarity, turmeric extract had a lower Rf value and was more polar. Moreover, caffeine exhibited a more polar, concentrated solution behaviour, and lower Rf value. Plant base extract can be utilized as a natural colouring agent in highlighter pens by employing each aspect that was examined. By doing so, hope PASTERN will establish itself as a non-toxic, environmentally friendly stationery option in the future.