It is necessary to obtain the printing effect of the bottom surface of the
model which is extremely flat;
The adhesion effect of some filaments (such as PA and PA filaments) on
the PEI coating surface may not be ideal. In this case, the non-PEI coating
surface can be used for printing.
When you notice that the PEI coating has been damaged, it may affect the
printing effect.
When printing with a PEI-free coating surface, it is recommended to apply a solid
adhesive (provided, see tool box) to the glass surface to strengthen the adhesion
of the first layer.