Two new special stain kits are now available. The Papanicolaou (PAP) stain kit enables researchers to differentiate between a variety of cells in vaginal smears, aiding in the detection of vaginal, uterine, and cervical cancer. In addition, this kit is also valuable for staining a variety of other bodily secretions and cell smears. The Picro-Sirius Red stain kit (for collagen) is intended for use in the histological visualization of collagen I and III fibers in addition to muscle in tissue sections. The PSR stain may be viewed using standard light microscopy or polarized light, resulting in birefringence of the collagen fibers to distinguish between type I and type III.