TrueBlock(R) allows you to apply labels to a dark surface or over existing copy or marks Completely blocks out existing information. Ideal for priority messages, addressing, color-coding, identification/warning labels and more. Permanent adhesive ensures labels stick and stay without lifting or curling. Easy to format using preset layouts in Microsoft(R) Word, WordPerfect(R) and other popular software. Designed for use with most inkjet and laser printers. Forest Stewardship Council (FSC) - for wood/paper products from forests certified to the 'gold' standard of responsible forestry. Forest Stewardship Council US-0081. FSC Certification ensures responsible use of forest resources and provides assurance that the fiber in this paper comes from forests that are well-managed to protect biodiversity and the livelihoods of the people that depend on those forests. Avery Filing Labels part of a large selection of office supplies. Avery(R) TrueBlock(R) Color Permanent Inkjet/Laser File Folder Labels, 2/3in. x 3 7/16in, White, Box Of 1,500 is one of many Permanent Filing Labels available through Office Depot. Made by Avery.