1:envelop,paper envelop,kraft envelop. 2:silkscreen printing 3:pantone colors or the common 4 color(CMYK) process. envelop,paper envelop,kraft envelop.1:Material:any paper2: Printing system:silkscreen printing,offset printing,UV printing3: Customized requests with clients designs and logos are acceptable.4: Descriptions:nonpoisonous.beautiful, durable and convenient to use.