Sublimation Blank coloured Backpack Sublimation School Backpack blanks | Sublimation Blank Backpack | Custom Book Bag | School Bag with Removable Panel for easy printing. This backpack is an ideal for all types of back to school gifting, promotional products and daily use. You can print your images on the blank area by using dye sublimation printing process. Sublimation Blank Backpack Material: Polyester Product Color: pink, purple blue, navy Size : Refer to listing picture for detailed sizing. Product Application: These blanks are ideal for decoration using dye sublimation printing. It can also be used for other type of craft decoration as well. These are awesome gifts for different daily use items. Referential Printing Parameters: 400 F (205℃), 30~40 seconds.