Electrophotographic composition

1. An electrophotographic composition comprising toner particles dispersed in a liquid carrier, wherein the toner particles comprise a polymer resin and porous silica particles infused with a fragrance.

2. The electrophotographic composition as claimed in claim 1 , wherein the silica is fumed silica.

3. The electrophotographic composition as claimed in claim 1 , wherein the porous silica particles infused with fragrance are present in an amount of 0.1 to 50 weight % of the total weight of solids in the composition.

4. The electrophotographic composition as claimed in claim 1 , wherein the porous silica particles have an average particle size of 1-1000 nm and/or a surface area of 5-1000 m 2 /g.

5. The electrophotographic composition as claimed in claim 1 , wherein the porous silica particles are infused with fragrance, whereby the weight ratio of fragrance to the porous silica particles is from 1:2 to 30:1.

6. The electrophotographic composition as claimed in claim 1 , wherein the polymer resin is a thermoplastic resin having acidic side groups.

7. The electrophotographic composition as claimed in claim 6 , wherein the thermoplastic resin comprises a copolymer of ethylene and either acrylic acid or methacrylic acid.

8. The electrophotographic composition as claimed in claim 1 , wherein the composition is an electrophotographic varnish.

9. The electrophotographic composition as claimed in claim 1 , wherein the toner particles comprise at least one colorant.

10. The electrophotographic composition as claimed in claim 1 , which includes a charge adjuvant.

11. The electrophotographic composition as claimed in claim 1 , which includes a charge director.

12. The electrophotographic composition as claimed in claim 3 , wherein the polymer resin is a thermoplastic resin having acidic side groups.

13. The electrophotographic composition as claimed in claim 1 , wherein the porous silica particles have a pH of 3 to 5.

14. The electrophotographic composition as claimed in claim 1 , wherein the porous silica particles have an average particle size of 15 nm to 200 nm.

15. The electrophotographic composition as claimed in claim 1 , wherein the polymer resin comprises a co-polymer of ethylene and acrylic or methacrylic acid which is at least partially neutralized with Zn, Na, and/or Li metal ions.

16. A method of forming a printed image on a substrate, said method comprising electrophotographically printing an image onto a print substrate using an electrophotographic composition that comprises a polymer resin and porous silica particles infused with a fragrance.

17. The method as claimed in claim 16 , wherein the electrophotographic composition is a varnish composition that comprises the porous silica particles infused with the fragrance, and wherein electrophotographically printing the image onto the print substrate comprises electrophotographically printing a coloured image onto the print substrate using an electrophotographic ink composition, and electrophotographically printing the varnish composition onto the coloured image.

18. The method as claimed in claim 17 , wherein the porous silica particles are particles of fumed silica.

19. The method as claimed in claim 18 , wherein the polymer resin is a thermoplastic resin having acidic side groups.

20. A print substrate comprising an image formed from at least one layer of an electrophotographic composition printed onto the substrate, wherein the electrophotographic composition comprises a polymer resin and porous silica particles infused with a fragrance.