Bubble wrap iBubble wrap, which will not be able to be popped. Bubble wrap Bubble wrap is a pliable transparent plastic material used for packing fragile items. Regularly spaced, protruding air-filled hemispheres (bubbles) provide cushioning for fragile items. "Bubble wrap" is a generic trademark owned by Sealed Air Corporation. In 1957 two inventors named Alfred Fielding and Marc Chavannes were attempting to create a three-dimensional plastic wallpaper. Although the idea was a failure, they found that what they did make could be used as packing material. Sealed Air Corp. was co-founded by Alfred Fielding in 1960. The term is used generically for
Conservation and restoration of photographic plates used to wash the silver particles that are not part of the image, which then produces a stable negative image. This negative image can then be used over many years to produce paper positives. Glass plates as a form of support were popular in use between 1851 and the 1920s. Photographic plates face certain challenges to their preservation. In order to protect against deterioration or damage, conservators seek to identify the agents that threaten the various materials that make-up photographic glass plates. The primary agents of deterioration include the following: Relative humidity (RH) and temperature are two of the most