What Chlorine Free Means

As Kermit sings, “It’s not easy being green.” Especially if you’re involved in the printing or paper industry.

We all like white paper. It’s easier to read and easier to print on. But paper isn’t naturally white. To make paper white requires bleaching. White, good; bleaching—using chlorine, bad.

I was initially confused by the alphabet soup of claims for chlorine free paper products.  

What Do PCF, TCF, and ECF Mean?

When researching chlorine-free paper, you’ll often encounter three common abbreviations:

PCF (Processed Chlorine Free)

PCF paper contains recycled content and is processed without chlorine or chlorine derivatives during the recycling process.

TCF (Totally Chlorine Free)

TCF paper is made from virgin fibers that have never been bleached using chlorine or chlorine compounds.

ECF (Elemental Chlorine Free)

ECF paper uses chlorine dioxide instead of elemental chlorine gas during bleaching. While it reduces harmful emissions compared to traditional chlorine bleaching, it is generally considered less environmentally friendly than PCF or TCF options.

Understanding these terms makes it easier to compare paper products and choose the option that aligns with your sustainability goals.

After some research I discovered the order of preference (environmentally speaking) for the various paper bleaching processes.

Again, this does not take into account other environmental considerations
such as energy usage or carbon footprint.

[Kermit is a trademark of The Muppets
Studio, LLC, a wholly owned subsidiary
of The Walt Disney Company.]

Best: Processed Chlorine Free Recycled papers are typically processed chlorine free (PCF), which means that no chlorine or chlorine derivatives were in the recycling process, but that papers which were originally bleached with chlorine or chlorine derivatives may have been used as feedstock.

PCF paper contains recycled content produced without elemental chlorine or chlorine derivatives, although one or more fiber components may have originally been bleached with chlorine or chlorine derivatives.

PCF is preferable to totally chlorine free (TCF) because it includes recycled content. Virgin pulp is TCF.

Most environmental groups, such as the National Resources Defense Council consider Processed Chlorine Free to be the most preferable.

Supported by groups like the Natural Resources Defense Council (NRDC)

Totally Chlorine Free
Totally chlorine free (TCF) uses no chlorine compounds for the bleaching of wood pulp for paper production. This prevents the formation of dioxins, highly carcinogenic pollutants.

TCF papers are much more environmentally preferable than elemental chlorine free papers because chlorine derivatives—while less harmful to the environment than elemental chlorine—still produce toxic chlorinated organic compounds, including chloroform, another known carcinogen. These compounds are released into waterways as effluent from the bleaching process, where they produce environmental damage.

Virgin paper is produced without chlorine or chlorine derivatives (the bleaching process uses oxygen-based compounds).

Products using the PCF or TCF labels are certified by the Chlorine Free Products Association, an independent not-for-profit accreditation and standard setting organization.

Products labeled PCF or TCF are often certified by the Chlorine Free Products Association (CFPA).

Elemental Chlorine Free
Next down the list comes the family of elemental chlorine free (ECF) processes. Elemental chlorine free means chlorine compounds are used, rather than chlorine gas.

Enhanced elemental chlorine free (EECF) removes more of the lignin from the wood before bleaching, resulting in the need for less bleach. Compared to traditional ECF, EECF saves more energy, improves the quality and reduces the quantity of mill wastewater.

There are some alternatives to using bleach:

Enhanced ECF with ozone or hydrogen peroxide substitutes ozone or hydrogen peroxide for chlorine or chlorine dioxides as a brightening agent in the initial stages of the bleaching process (the final or near-final stage uses chlorine dioxide).

Enhanced ECF with extended or oxygen delignification removes more of the lignin from the wood before bleaching, thus reducing energy and chemical use during bleaching (the final stage uses chlorine dioxide).

Elemental chlorine-free (ECF) replaces elemental chlorine with chlorine dioxide in the bleaching process. This next-to-the-last choice is still preferable to any process that uses pure chlorine.

Worst: Elemental Chlorine
The least preferred bleaching method is pure elemental chlorine, which was phased out in the U.S. in 2001.

So, if you’re concerned about chlorine, look for the PCF or TCF logos.

ECF vs TCF vs PCF: Which Is Best?

While all three options reduce the environmental impact of paper production, they are not equal.

For most environmental organizations, PCF paper is considered the preferred choice because it combines recycled content with chlorine-free processing.

Why It Matters for Printing

If your business cares about:

• Sustainability
• Corporate social responsibility
• Eco-friendly branding

… choosing the right paper matters.

Related Reading: Sustainability and Awareness – Print Marketing in April

Where to Learn More

For more information on chlorine-free paper and sustainable printing:

• EPA Guide on Pulp and Paper Manufacturing
• NRDC on Paper Production
• Chlorine Free Products Association

Make Greener Choices with Overnight Prints

At Overnight Prints, we’re committed to helping businesses choose sustainable printing options—without sacrificing quality.

Whether you’re printing:

✅ Marketing brochures
✅ Business cards
✅ Custom packaging
✅ Promotional materials

… we offer premium print solutions for your eco-friendly needs.

Frequently Asked Questions About Chlorine-Free Paper

What Is Elemental Chlorine Free (ECF) Paper?

Elemental chlorine free (ECF) paper is produced using chlorine dioxide instead of elemental chlorine gas during the bleaching process. This method significantly reduces harmful emissions compared to traditional chlorine bleaching, making it a more environmentally responsible option.

What Is the Difference Between PCF and TCF Paper?

Processed Chlorine Free (PCF) paper contains recycled fibers and is manufactured without chlorine or chlorine derivatives during the recycling process. Totally Chlorine Free (TCF) paper is made from virgin fibers that have never been bleached using chlorine-based chemicals.

The main difference is that PCF focuses on recycled content, while TCF applies to virgin pulp.

Is Chlorine-Free Paper Better for the Environment?

In general, yes. Chlorine-free paper helps reduce the production of harmful byproducts that can be released into waterways during paper manufacturing. Many environmental organizations consider chlorine-free bleaching methods to be a more sustainable alternative to traditional chlorine bleaching.

What Does ECF Mean in Paper Manufacturing?

ECF stands for Elemental Chlorine Free. It indicates that elemental chlorine gas was not used during bleaching. Instead, chlorine dioxide is used to whiten the paper pulp while reducing environmental impact.

What Is the Most Environmentally Friendly Chlorine-Free Paper Option?

Many environmental groups consider Processed Chlorine Free (PCF) paper to be the preferred option because it combines recycled content with chlorine-free processing. Totally Chlorine Free (TCF) paper is also considered highly environmentally friendly, especially when recycled options are not available.

Why Is Paper Bleached?

Paper is naturally brown because it contains lignin, a substance found in wood fibers. Bleaching removes or lightens the remaining lignin to create the bright white paper commonly used for printing, packaging, books, and marketing materials.

What Certifications Should I Look for When Buying Eco-Friendly Paper?

Look for certifications and labels such as:

• Processed Chlorine Free (PCF)
• Totally Chlorine Free (TCF)
• Chlorine Free Products Association (CFPA) Certification
• FSC (Forest Stewardship Council) Certification
• Recycled Content Certifications

These labels can help verify environmental claims and make it easier to choose sustainable paper products.

Does Chlorine-Free Paper Affect Print Quality?

No. Modern chlorine-free papers offer excellent print quality and are commonly used for brochures, business cards, catalogs, direct mail, packaging, and other professional printing applications. Most customers cannot tell the difference between chlorine-free paper and conventionally bleached paper based on appearance alone.

Can Businesses Use Chlorine-Free Paper for Marketing Materials?

Absolutely. Many businesses use chlorine-free paper for brochures, postcards, business cards, presentation folders, and other printed marketing materials as part of their sustainability initiatives. It allows companies to reduce environmental impact while maintaining a professional appearance.

Explore our sustainable printing options today at Overnight Prints.