Pap Pen Marking pen for histological and cytological specimens, ideal for immunohistochemistry. Long-lasting marking of the interested area Guaranteed antibody or reagent containment on the slide Insoluble to alcohol and acetone Waterproof Resistant to microwaves and temperatures up to 120° C Removable with xylol or alternative products Pen for immunohistochemical staining that allows to delimit the staining area. It deposits a water-repellent waxy film that delimits the staining area. The pen writes directly on the wet slide and can also be used with staining that uses microwaves and in situ hybridization.