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
Polaroid art instant peel-apart film to a new surface. Image transfers are done by peeling the negative positive sandwich apart early in development and pushing the wet negative side down firmly onto a sheet of print-making paper and applying an even pressure with a roller transferring it to the new surface. Polaroid art Some Polaroid instant films are suitable for various forms of alternative processing leading to artistic effects. One form was the manipulation of SX-70 using various tools before the emulsion dried to create an oil painting effect. However, SX-70 is no longer in production and similar films by the Polaroid