Highquality, bright white, address labels are environmentally friendly and compatible with laser and inkjet printers. Face sheet is made using 100 percent recycled postconsumer fiber and is processed chlorinefree (PCF). The adhesive meets the USPS specification USPS21238 so it can be safely recycled. Return address labels are both acidfree and ligninfree, making them safe for archiving. They will not yellow. Formats are compatible with most popular wordprocessing and labelmaking software.