How is a Torah scroll constructed?
The Torah scrolls are entirely handwritten in Hebrew by a sofer (scribe) on parchment from a kosher animal. This is usually a cow. It can take up to 18 months to complete the whole process from the complex preparation of the animal skins to the writing of the final words. Great accuracy is needed when the sofer writes the scroll. If he makes any mistakes it can make the whole scroll pasul (invalid). The completed scroll is known as a Sefer Torah from sefer which is the Hebrew for book. A Sefer Torah is so sacred to Jews it is said that if one is accidentally dropped in the synagogue the whole congregation must fast for 40 days. When Jewish communities have suffered persecution, great efforts would be made to preserve these scrolls. This demonstrates just how symbolically and physically important the Torah is to Jews.
