A duplex is the pasting together of two sheets of paper, making one thicker sheet in the end. An example – two 100lbC sheets pasting together to provide a 200lbC final thickness. Having this added thickness is another way we increase the unique impact and tactility of our work.
Our primary reason is to avoid impression show through on two sided press work. We call this Duplex After. Duplexing two sheets together AFTER PRINTING offers our clients the most premium letterpress work in the industry. We can get a heavy impression on BOTH sides of the sheet with a minimum of impression show through. Artwork that overlaps from front to back has minimal effect when duplexing because the impression bruising is encapsulated in the middle of the sheet.
Not all papers come from the paper mill at a heavy weight, hardly any actually. Even with a thick paper like 220lbC cotton, a heavy impression overlapping from one side to the other will affect artwork. Plus, if we only need 10 sheets of a special thick paper, we can make it in house and don’t have pass along the cost of a full carton of stock.
The glue we use to paste paper together is from the book bindery industry. Our cards do not fall apart.
Around 80lbC, pasting up to a 160lbC final weight is as thin as we like to go but we have done 65lbC. We do not duplex text weight sheets. The thinner the sheet with a heavy impression, the less the bruising from heavy impression can be hidden. We find pasting around a 100lbC up to a 200lbC final thickness is ideal.
We can duplex, triplex, quadplex – maybe even sexplex. Although, we haven’t tried that yet, we’ll try anything once.
Yes we can. This is great way to create new exciting papers that nobody else has. It is also a great way to add a punch of color to your letterpress project without the cost of another ink color. We can also do a “sandwich” effect with three or four sheets – like a white paper on front and back with a red layer in the center.