Polaroid (polarizer) Polaroid (polarizer) Polaroid is a type of synthetic plastic sheet which is used as a polarizer or polarizing filter. A trademark of the Polaroid Corporation, the term has since entered common use. The original material, patented in 1929 and further developed in 1932 by Edwin H. Land, consists of many microscopic crystals of iodoquinine sulphate (herapathite) embedded in a transparent nitrocellulose polymer film. The needle-like crystals are aligned during manufacture of the film by stretching or by applying electric or magnetic fields. With the crystals aligned, the sheet is dichroic: it tends to absorb light which is polarized parallel to
Instant camera it was from the appearance of this that the artist had interest in giving this more personal touch and in experimenting with the photographs, and that is that the film of this camera allowed to modify, scratch and distort the emulsion, resulting in an image with varied effects. The artist Lucas Samaras, for example, was among the first to modify the images taken with the Polaroid SX-70 through the "Polaroid transfer". Thus, he developed the series "autoentrevistas", a set of self-portraits in which he takes the place of a model in different circumstances. John Reuter, the director of the 20