Talent PAP pen is a special marking pen that provides 2mm green-tinged hydrophobic barrier when a circle is drawn around a specimen on a slide.This water repellent barrier keeps staining reagents localized on the tissue sections, prevents mixing of reagents when differentially staining two sections on the same slide, and can save reagents for each section. The working tempeture of Talent PAP pen should be under 120℃. The ink volume of this pen is 3ml, so it can be used for around 500 times.