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 The art of papermaking dates back several thousand years to around 3,000 BC, when paper was originally made from papyrus.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.
Lance Sweets was brought into the series in the fourth episode of season three ( The Secret in the Soil ) as a psychologist to Seeley Booth and Temperance Brennan. His presence provided a bit of comic relief, as he was often the target of insults from both Booth and Brennan.(To Brennan and Booth). In the subsequent episode, The Lance to the Heart , his killer is revealed to be a Navy SEAL named Kenneth Emory, who acted on the orders of Glen Durant. Durant then fatally stabbed Emory, who was wounded by Sweets' shots, to cover up his involvement in the murder.