The Macon MML-3025 All Purpose Labels are acid and lignin-free. Theselabels can be printed with an inkjet or laser printer without jamming.With a permanent adhesive on the back, these Macon laser and inkjetlabels perfectly adheres to the object and stays where you put it.They are suited for bulk mails and can be used for easy identification.These permanent adhesive labels can be customized for various usesas they work well with popular label software programs.