If you are business minded, a nurse that makes house calls may be the business opportunity for you. In fact, this is historically how most nurses practiced until the 1940s. It is an area with huge growth potential.
Smell is chemistry, and the chemistry of old books gives your cherished tomes their scent. As a book ages, the chemical compounds usedâthe glue, the paper, the inkâbegin to break down. And, as they do, they release volatile compoundsâthe source of the smell. A common smell of old books, says the International League for Antiquarian Booksellers, is a hint of vanilla: âLignin, which is present in all wood-based paper, is closely related to vanillin. As it breaks down, the lignin grants old books that faint vanilla scent.â
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 The art of papermaking dates back several thousand years to around 3,000 BC, when paper was originally made from papyrus.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.