It was during the middle ages, that the process of acid glass-etching was somewhat clouded with controversy, since its acid medium, hydrofluoric acid, was causing a high health risk to the artisans, so much so that the users were known to have been poisoned merely by its fumes.
Many accidents happened when the acid made contact with the skin, which in turn would dissolve the tissues. The result of the acid would often result in the artisan being mutilated or lose their fingers.
As a result of the risk and their injuries, acid etched glass craftsmanship tended to lack refinement and lost its lustre as an art collection.
Today, specialist tools such as adhesive protection masks, pick knives and swivel knives aside from the squeegee, these tools make it possible for people to work on acid glass-etching projects. Acid glass-etching is a difficult process and protection must be worn at all times.
