Before you can begin printing models, you need to prepare the VAT surface. Using just bare glass will result in a mess and unsuccessful prints since the glass has to be covered with a layer of PDMS resin, which will help each layer to detach from the surface and produce smooth results. Find out more about the preparation process and what needs to be done in order to be able to produce good results. Please note that this tutorial is meant for the Small VAT but the same process applies for the large one as well.