Abstract: A packaging sheet comprising a mixture of compound A ?where R1 may be an alkyl, alkoxy or alkylene radical having 1 to 6 carbon atoms; X1 and X2, identical or different, may be hydrogen or a halogen. and compound B ?X3, X4, X5, and X6 being identical or different and selected from Cl, halogens or alkyl compounds having 1 to 6 carbon atoms or hydrogen; the particle size of the mixture being less than 10 ?m.