Optically variable pigments providing a colour shift between...

Details Optically variable pigments providing a colour shift between... Optically variable pigments providing a colour shift between...

C - Chemistry, Metallurgy

09

C

C09C 1/64 (2006.01) B41M 3/14 (2006.01) C09D 5/29 (2006.01) C09D 5/36 (2006.01) C09D 11/02 (2006.01) C23C 14/14 (2006.01)

Patent

CA 2341856

The invention relates to optically variable pigments (10) having a colour shift between two distinct colours of any of the known designs. The pigments having incorporated a totally reflecting layer made by physical vapour deposition from aluminium alloy (11). This pigment exhibits excellent chromaticity, corrosion resistance, particularly in any kind of coating composition or printing ink and especially when water is present.

L'invention concerne des pigments (10) variables optiquement ayant une distorsion de couleur entre deux couleurs distinctes de n'importe lequel des types connus. Dans les pigments est incorporée une couche totalement réfléchissante produite par dépôt en phase gazeuse par procédé chimique à partir d'un alliage d'aluminium (11). Ce pigment présente une excellente chromaticité, une résistance à la corrosion, notamment dans n'importe quel type de composition de revêtement ou encre d'impression et en particulier en présence d'eau.

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