What is paper sizing?
Apr 28, 2020

There are two types of paper sizing: internal and surface sizing. Internal sizing is added to paper furnish before forming the paper and gives the paper "wet strength" or resistance to penetration of water and ink oils. Blotter and filter papers are examples of unsized papers. Lithographic papers are sized to give the paper some resistance to absorbing the fountain solution and falling apart. Surface sizing is applied to the paper by sizing rollers before the paper web is completely dry. Surface sizing bonds the surface fibers together, increasing the paper's surface strength. Some of the surface sizing penetrates the surface of the paper reducing ink penetration and increasing the ink holdout. Excessive surface sizing contributes to the paper fibers not bending and cracking in folding operations.

Paper Paper

Related Content

Monadnock Paper Mills Revolutionizes Custom Paper Solutions

Monadnock Paper Mills, Inc., the oldest continuously operating paper mill in the US and a leader in sustainable and innovative paper solutions, makes custom paper more accessible to brands of all sizes. Monadnock's expertise empowers businesses to confidently push creative boundaries in a market that demands adaptability, with hundreds of custom variations of its flagship fine printing paper, Astrolite, developed to date. This dedication to delivering accessible tailored solutions is partly how Monadnock has maintained its quality reputation for over 200 years.

Millcraft Paper Company Names Greg Lovensheimer as First Non-Family President in Company's 104-Year History

CLEVELAND, OHIO – September 16, 2024 – Millcraft Paper Company, a family-owned merchant serving the professional paper, packaging and graphic arts industries, proudly announces the appointment of Greg Lovensheimer as President, marking the first time in its 104-year history that the company has appointed a non-family member to this leadership role.

It’s a Partnership Party: Case Paper Teams Up with Holmen Iggesund and Stora Enso

Two’s a crowd, but three’s a party! Between Case Paper, Stora Enso, and Holmen Iggesund, this is certainly a celebration worth attending. These new mill partnerships bring three powerhouse paperboards to Case Paper: CKB, CKB Carrier, and Invercote Creato. Cheers to that!
}