Extraction of natural pigments
Pigments have evolved since primitive men used them for body and cave paintings and later for colouring fabrics, leather, cosmetics, paper and food.
Nature surrounding us offers a multitude of colours and shades. In a garden - from soil to colourful flowers - or in our kitchen - beetroot, coffee or saffron - all these colours populate our daily lives and can be extracted in many ways.
Nowadays, many in-use elements are no longer of natural origin, i.e. they are not extracted exclusively from natural elements but are of synthetic origin. Therefore, paying attention to their toxicity and possible environmental harm is essential.
We challenge you to extract pigments of natural origin using colourful and diverse vegetables you have at home. Diogo Vasconcelos, a student of the 6th B, accepted and experimented. He created colours using coffee, saffron and spinach and used them to make paintings.