Читать книгу 3D Printing of Foods - C. Anandharamakrishnan - Страница 52

In continuous inkjet printing, the edible ink is continuously dispensed without any pause through a piezoelectric vibrating crystal at a constant frequency. The use of a high‐pressure pump creates a continuous flow that directs the liquid food ink through an orifice of smaller diameter ranges between 50 and 80 μm (Godoi et al. 2019). In some cases, the material flowability can be ensured by incorporating conductive agents into food ink to impart charges. The use of electrically charged conducting agents for improving the performance efficiency limits its application in food customization. The droplet generation rate of continuous inkjet printing is comparatively higher than the DoD inkjet printing. However, the resolution and precision of the produced images from DoD inkjet printing seem to be superior with neat dispensing than continuous inkjet printing. Willcocks et al. (2011) reported that the maximum resolution of inkjet printed images using a single head continuous ink‐jetting system of about 70–90 dots per square inch (dpi).