Cal·o·type
/ˈkaləˌtīp/
an early photographic process in which negatives were made using paper coated with silver iodide.
PROCESS ;
Calotype, also called talbotype, early photographic technique invented by William Henry Fox Talbot of Great Britain in the 1830s. In this technique, a sheet of paper coated with silver chloride was exposed to light in a camera obscura; those areas hit by light became dark in tone, yielding a negative image.
Yes narrative form can be used
Surgical masks are not designed for use as particulate respirators and do not provide as much respiratory protection as an N95 respirator. ... Most surgical masks do not effectively filter small particles from the air and do not prevent leakage around the edge of the mask when the user inhales.
