To overcome this problem, PDMS microfluidic molds can be fabricated by stereolithography (SLA) or masked stereolithography ((m)SLA) printers, more colloquially called "resin printers". These printers use the same concept of stereolithography: Photopolymerization of (met)acrylates using either laser (SLA) or UV light and an LCD screen that acts as a mask (m(SLA)). The resin printers are commercially available for home use, cheap, and easy to operate. 3D designing and printing molds using 3D printers is easier and more accessible than making all the steps for fabricating molds using stereolithography. In principle, it can be done at home. The drawback of those resin printers is that their lateral resolution is limited by the laser spot size, usually in the hundreds of micrometers, or by the pixel size on the LCD screens, generally around 50 µm. In addition to this limit, photopolymerization is challenging to control. The light will crosslink an area more extensive than the one illuminated, making the resolution in XY even inferior to the physical limit of the laser or pixel sizes. It is impossible to use those resin printers to recreate XY features with the same fine resolution as lithography methods.