Stereolithography is based on the photopolymerization of liquid monomers by using light (UV or visible). Normally the monomers are products derived from non-renewable sources and furthermore most of them could give health concerns. For this reason we have developed monomers starting from vegetable oils.
![vegetable-oils](http://www-4.unipv.it/3d/wp-content/uploads/2016/07/vegetable-oils.png)
The challenge was also to find a suitable photoinitiator for the polymerization reaction under visible light. In fact, the idea was to use a normal digital projector for the assembly of the 3D-printer.
![VEGETABLE OILS](http://www-4.unipv.it/3d/wp-content/uploads/2016/03/VEGETABLE-OILS.png)
The product obtained (figure below, on the left) shows interesting thermal resistance.
![thermal-resistance](http://www-4.unipv.it/3d/wp-content/uploads/2016/07/thermal-resistance.png)