Umuthi we-campeche (Haematoxylum campechianum): inhliziyo yomuthi wase-America ephakathi eqoshwe ibe izingcezu, enikeza okumnyama nokunsomi okuzotha kunawo wonke okwakutholakala kwabadaya ngaphambi kwemibala eyenziwe ngekhemikhali. Umbala wawo, i-haematoxylin, uma uguqulwe ube i-haematein ngomoya, ubambelela ehlanjini elilungiselwe ngesibopho futhi unikeza umbala onsomi ozotha, insomi, okuluhlaza okwesibhakabhaka okumnyama, umpunga nokumnyama kwangempela kuya ngesibopho esisetshenzisiwe. I-alum inika insomi; i-chromium inika okuluhlaza okumnyama; insimbi inika okumnyama. I-campeche yayibiza kakhulu kangangokuthi i-England yalwa izimpi ngamalungelo okugawula e-Belize nase-Yucatán. Isasetshenziswa namuhla ekudayeni izicubu (ukudaya kwe-H&E).