Dupli is the largest envelope imprinter in the Northeast with printing plants in New York, Pennsylvania and Connecticut. Envelopes are the history of our company. Remaining our largest business segment. We love them!

In 2017, we put in our first converting machine specializing in converting #10, 6″ x 9″ and 6″ x 9.5″ window envelopes, as well as additional sizes. State-of-the-art converting equipment allows us to make some of the coolest mailing products in the market today.

Let Dupli help you get the most out of mailing projects. Maximize the supply chain to reduce inventory or find new ways to make your direct mail campaign stand out!

shaped envelopes

Shaped Envelopes

USPS approved to mail at automated rates and will ensure you stand out in the mail.

print and convert envelopes

Print and Convert

Everyone sees the outside. Are you using it effectively?

remittance envelopes

Fundraising Remittance

Make it easy for donors and help drive up fundraising response rates.

banking drive thru envelopes

Banking Drive Thru Envelopes

Great opportunity to cross sell. We print alternating messaging that tells your story.

coin envelopes

Coin Envelopes

Useful across industries such as banks, manufacturing, & retail. Easy to fill containers.

expansion envelopes

Expansion Envelopes

Right size your packaging. Brand your packaging. Save freight.

invitation envelopes

Invitation Envelopes

Hundreds of products in-stock. Offering a wide variety of colors and sizes to choose from.

tyvek envelopes

Tyvek® Style

Light weight, yet amazingly strong.

tri-brite envelopes

Tri-Brite Style

A bright paper product with the durability of synthetic paper

herculink envelopes

Herculink Style

Uniquely textured, making them burst and tear resistant.

peel and seal envelopes

Peel & Seal

Self seal, clean, easy and secure closure. Add peal and seal to any style!

brown kraft envelopes

Brown Kraft

Various paper grades and sizes including brown kraft.

FSC certified envelopes

FSC® Certified

Demonstrate your support for responsible forest management!

business envelopes

Business Style

Shipping thousands of orders per day, in many different sizes.

custom envelopes

Custom Envelopes

Creative windows, die-cuts or perforations. We can do it.

double window envelopes

Double Window Envelopes

Hundreds in-stock and ready for order today.

hotel and credit card envelopes

Hotel & Credit Card Sleeves

RFID card sleeves for increased security or Tyvek® for durability.

colored wove envelopes

Colored Wove Envelopes

If you have a color you need, chances are we have it.