The optimal bio-ink formulationwas filled
in the cartridge of technical drawing pen and created a linear pattern
or a solid area of BSA on the paper in order to check satisfactory functional properties of the ink. The lines or area of BSA was visualized
with the blue colour from BPB contained in the ink formulation.
The model bio-ink without the addition of BPB provided a
slightly lower viscosity, however, it was still in the optimal range of
viscosity that can be plotted on the paper.