The CST oversees the Scientology scriptural archiving project, which aims to preserve the works of Hubbard on stainless steel tablets and encased in titanium capsules in specially constructed vaults throughout the world. Copies of Hubbard's works go through a rigorous process, beginning with the removal of deterioration-causing acid from the paper, and then being placed in plastic envelopes. They are then placed in the titanium "time capsules." The writings are also carved into stainless steel plates, which, according to Church of Scientology officials, can withstand being sprayed with salt water for a thousand years. Hubbard’s taped lectures are recorded again into gold compact discs encased in glass.