Occasionally unbound items come into the Paper Lab that are too thin to warrant a corrugated box, but they usually require a more substantial enclosure than a folder. The middle ground between those two enclosures is a four-flap portfolio made out of 20 pt. stock or, in some instances, corrugated board.
After the portfolio is constructed, the way to secure it closed is by simply tying a length of twill tape around it like a Christmas present. Then the tape is glued in place or threaded through the back of the portfolio. The result is neither very attractive nor very efficient. When setting flat on a table, the portfolio flaps often pull away from the rest of the enclosure, no matter how tight the ties are. When open on a table, the ties easily get lost underneath the rest of the portfolio.
Lately I have been making more of these portfolios than usual, and I wanted to come up with a less wasteful, more effective way to secure them. A technique used in the General Conservation Lab for fastening binder’s tape to board looked promising, so I tried it a couple of months ago with a portfolio made out of B-flute corrugated board. The result was very satisfying, and took care of all my complaints about the former method.
I wanted to be able to use the ties with portfolios made of thinner materials like 20 pt. stock, but I knew they would not hold up for long, if at all. A backing would be required.
Then I remembered Tyvek, which is easy to cut and almost impossible to tear. It also works well with PVA.
I put together some sample ties with and without Tyvek backing. The ties backed with Tyvek wouldn’t tear, no matter how hard I pulled. The ties glued directly to the surface of the board tore after the first big yank. I used the new method on an oversize portfolio that required two sets of ties, and the finished product looked as great as it is secure.
The advantages to this method are that there is less twill tape used per portfolio and the completed enclosure is stronger, more effective, neater in appearance, and more manageable for patrons and staff.