... 2.Customized 3.Automatic production Item: envelope,color envelope,printing service,printingSpecifications 1) Size : DL 2) Materials : paper ... bag, paper box,gift box, paper sticker,catalogue,notebook,playing cards, hang tag,brochure,calendar etc ... 9 years we have been engaged in professional printing and packaging indurstry solutions. Our machines are ... ability to produce them. envelope printing service