Ink\({}_{3}\) does not oscillate and takes final form very fast after the impact with the surface. In addition, we can address differences in the droplet forming parameters depending on time (Figure 6). Here, in Figure 6, D\({}_{\text{d,max}}\) (Table 2) is the maximum droplet diameter (horizontal cross section); D\({}_{\text{h}}\) (Table 2) is droplet height (vertical cross section). Figure 4: Representation of the Reynolds and Weber numbers, showing the ink properties. Figure 5: Representation of the droplets (Ink\({}_{1}\), Ink\({}_{2}\), Ink\({}_{3}\)) velocity turnover. Velocity versus time. If we compare the jets of the different inks regarding length and maximum diameter (horizontal cross section), few main differences can be noticed. Ink\({}_{1}\) with lowest density and viscosity parameters has the smallest jet length and reveals the biggest oscillations. The droplet maximum spreading diameters is E\({}_{1}\) = 47.7 \(\upmu\)m. The droplet sphere diameter during flight is \(\sim\)22 \(\upmu\)m. The minimum spreading diameter has Ink\({}_{3}\) which does not oscillate at all. The latter depends on droplet density and viscosity parameters--the droplet takes its final form then it touches the substrate. It is important to know all these parameters if, for example, the use of UV curable inks is intended. Furthermore, after the droplet is generated, it is important to know the time period when the droplet reaches its final state on the surface. If we collate inks in this type of view, Ink\({}_{2}\) reveals the best suitable result. Droplet from Ink\({}_{2}\) does not oscillate much and has the smallest time period to reach a stable form on the surface. Droplets from Ink\({}_{1}\) reach the surface faster but, in case of too low viscosity and density parameters, oscillate more strongly before they take their final form on the surface. For UV curable inks, it is very important to undergo this step in the stable phase of the droplet. In the next graph (Figure 7), droplet mass change is demonstrated. Droplet mass is integrated over the computational domain. At point A, the droplet reaches its maximum velocity and the droplet mass starts to increase during the first period till it reaches point B. At point B, the droplet thread is pulled off from the printing nozzle and mass is fully given. Droplets of different inks increase very similarly (Ink\({}_{1}\) fully formed  
Figure 6: Representation of the droplet size of Ink\({}_{1}\), Ink\({}_{2}\), Ink\({}_{3}\) versus time. Figure 7: Representation of the mass of the droplets (Ink\({}_{1}\), Ink\({}_{2}\), Ink\({}_{3}\)) versus time. at 11 us, Ink\({}_{2}\)-13 us, Ink\({}_{3}\)-14 us). When the liquid droplet is ejected, it needs a certain time and distance to reach the full spherical form and during the impact, it will lose its spherical shape and take final form on the surface. All these depend on the ejecting parameters, droplet velocity, nozzle configurations, and liquid characteristics. In order to examine the differences between ink droplets, their mass can be addressed, which are: Ink\({}_{1}\) droplet \(m_{d}=14.4\cdot 10^{-12}\) kg, Ink\({}_{2}\) droplet \(m_{d}=14.8\cdot 10^{-12}\) kg, Ink\({}_{3}\) droplet \(m_{d}=15.2\cdot 10^{-12}\) kg. From this graphic, we can see that droplet mass stays fixed after point B when the droplet thread is pulled off. In the next graphic (Figure 8), droplet volume formation is demonstrated. Droplets reach their final volume at the same instance as already obtained for the mass. Inks with highest density and viscosity reach the largest volume: Ink\({}_{1}\) droplet \(V_{d}=4.3491\) pL, Ink\({}_{2}\) droplet \(V_{d}=4.3493\) pL, and Ink\({}_{3}\) droplet \(V_{d}=4.3495\) pL.