... 3)Gravure Printing Security Certificate Paper Printing Characteristics1) 2D/3D/dot matrix/rainbow hologram2) Color change, metallic thread, barcode3) Micro ... labels in China.3. Our products include 3D holograms, Dot-matrix hologram stickers, transparent hologram overlays and VOID hologram labels ... as barcode, air leakage empty, micro-text and so on.4. Our products are exported to Europe, North America, ...