When creating cytologic specimens, for the purpose of the prevention of peeling from
slide glasses, Cow serum or egg-white glycerin used to be coated on slide glasses.
However, these methods are not efficient to process a lot of specimens since it is
difficult to preserve the slide glass coated with egg-white glycerin. PLL slide makes it
possible for a long period of time to perform specimen processing of various materials
without peeling from the slide.