What is Artline?

Arline is also commonly known as "Security Printing", and refers to the random pattern printed on the inside of envelopes. This is used to obscure the content and prevent it from being read through the envelope and is frequently used for confidential documents or cheques. Envelopes with Artline are sometimes called "Cheque Envelopes", though they can be used for any application where the content needs to remain private.