Colaboration of Czeslaw Slania and Dwory Chemical SA (now Synthos) started in 2001. From that date Slania received more comission from Dwory, in some cases as Christmas gift for customers and other cases to be auctioned with benefits proposal.
- Steel engraving depicting a environmentally friendly facility, called «Regenox», engraved by Slania in 2003. It is containing information about ISO 14001, certificate of quality obtained by the company «DWORY S.A». 450 prints made.
- Copperplate engraving, called «Styrene», engraved by Slania in 2001. This engraving has been printed in different colours: sephia, graphite and blue navy. 450 prints made.
- Copperplate engraving, called «Butadiene», engraved by Slania in 2002. This engraving has been printed in different colours: sephia, graphite and blue navy. 450 prints made.
- Copperplate engraving, called «Polymerizators», engraved by Slania in 2004. Also this engraving has been printed in different colours: sephia, graphite and blue navy. 450 prints made.