Hammermill Copy Plus paper is an economical copy paper designed for everyday use at offices large and small. Offering dependable performance on all office machines, you'll want to have plenty of this dependable paper on hand for everyday, general office use. ColorLok for bolder blacks, brighter colors and faster drying. Backed by the 99.99% Jam-Free Guarantee. Acid-free material prevents yellowing over time to ensure a long-lasting appearance.