The prepared microalgae-based inks contain between two and three acrylate groups per molecule, which is within the range of func onaliza on of common printable materials. Thus, the next step was to prove their suitability as printable materials. Along with the func onal monomers/crosslinkers, one important component in the prin ng formula on is the photoini a ng system. As men oned in the introduc on, the use of biobased photoini a ng systems in 3D prin ng is scarce. In our case, a light sensi ve species, i.e. chlorophylls pigments, are present since they are highly lipid-soluble and thus are extracted along the triglycerides and remain a er func onaliza on (Figure ). Thus, we inves gate the possibility of using the func onalized extracts -without further purifica on-for twophoton 3D laser prin ng. Chlorophylls have been proven to be able to induce (controlled) radical photopolymeriza on of methacrylates and acrylamides. Further, chlorophyll and their deriva ves entail an aroma c porphyrin ring system which is known in the literature for its nonlinear op cal proper es. Such processes are believed to play a central role in the complex electron transfer mechanisms during photosynthesis. Thus, the microalgae-based inks rich in chlorophylls were tested in a commercial two-photon laser printer (Photonic Professional GT2 Nanoscribe GmbH & Co. KG, λ = 780 nm, Figure ). To prove the photopolymeriza on of the acrylate moie es ini ated by chlorophylls during prin ng was successful, FTIR spectra of the microalgae-based extracts, inks and the 3D printed microstructures were recorded and compared (Figure ). It is clearly visible that the characteris c absorp on bands a ributed to the double bonds in the acrylate groups at 1636, 1619 and 809 cm -1 present in the ink disappeared a er 3D prin ng indica ng their consump on during the prin ng process.