Photosynthetic printing material gets stronger with exposure to light

As a seedling matures into a tree, its trunk and branches become stiffer and stronger. Scientists have now replicated this effect in a photosynthesis-assisted 3D-printing ink, made partially from spinach.
Photosynthesis begins with plant cell substructures known as chloroplasts, which absorb sunlight. They use the energy from that light to convert water and carbon dioxide into glucose, which is in turn used to produce cellulose. Because cellulose is the main component of a plant’s cell walls, the greater the amount of cellulose that’s produced, the stronger the plant gets.
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