Permanent paper will last for several hundred years without significant deterioration. With a pH level of 7.5 or above, permanent paper grades are groundwood free with additional strength and performance properties that guarantee its use and retention for a maximum period of time. How does the acid get in the paper? The art of papermaking dates back several thousand years to around 3,000 BC, when paper was originally made from papyrus. Through the centuries and in different regions of the world, materials such as sheepskin, bamboo, silk, hemp and more recently, cotton rags took the place of papyrus.
[Warning: This story contains spoilers from Wednesday's Arrow, Eleven-Fifty-Nine.] Laurel Lance's (Katie Cassidy) death on Arrow may be controversial when it comes to the comic book source material, but her portrayer understands why Black Canary ended up in the flash-forward grave on The CW series.
Marc Graser. The CW has found its Flash: Grant Gustin. The actor, best known for his role as the villainous Sebastian on â Glee ,â will play Barry Allen in the second season of â Arrow .â The network is considering spinning off the character into his own series.