מכתב המלצה מהרה”ג רב עזריאל חייקין שליט”א מלפנים רבה הראשי של אוקראינה ורב וראב”ד דקהל מחזיקי הדת בריסל

For the Studying Kohen Knowledge Before Declaration This material is open to every serious learner, but it is arranged especially for the Kohen, whom the Torah designates to view the appearance and issue the operative declaration of tamei or tahor. The Kohen is not intended to serve merely as the voice of another person’s conclusion….

Kohen Study Note Bohak: A White Appearance Below the Nega Threshold + Core Definition Bohak, בוהק, is a pale or weak white appearance whose color falls below the minimum whiteness required for a qualifying skin nega. Because it does not reach the necessary degree of white, bohak is not itself a sign of tumah. Too…

For the Studying Kohen Learning to Distinguish the Torah’s Named Shades These laws may be studied by every serious student of Torah. Yet the Torah entrusts the formal viewing of a nega and the operative declaration of tamei or tahor to the Kohen alone. The Kohen is therefore not meant to serve as an uninformed…

The Torah discusses michve right after shchin, michve is an accidental scalding of the skin by fire, boiling water, a red hot iron or basically anything that burns.

The michve alone is not a call for tumah but it, like the shchin, can be a host for the shades of white as well as the discoloring of (at least) two white hairs that indicate tumah.