The laun­der process for a nega on a wool, linen or leather garment/vessel is per­formed on the sev­enth day of quar­an­tine of the infected gar­ment.

Does the seven ingre­di­ent clean­ing process depend on the gar­ment own­ers will­ing­ness to go through the trou­ble of laun­der­ing the affected gar­ment?  where he want­ing to make the gar­ment hefker (own­er­less), or just out­right burn it, does halacha afford him that right, or must he go through the process the torah spec­i­fies?

The process

Based on the torah’s instruc­tion וכבסו את אשר בו הנגע, is sourced in mishna, tosefta and the tal­mud as being a duti­ful process of seven key ingre­di­ents; (zvachim 95a, tosefta nidah 8 9);

    1. רוק טפל fast­ing spitlle (active ingre­di­ent is (bacil­liary) amy­lase)
    2. מי גריסין chewed pea paste
    3. מי רגלים urine (active ingre­di­ent is ammo­nia)
      Urine use is fermented for three days, high in ammonia, urine has been used for stain removal since antiquity.

      Urine use is fer­mented for three days, high in ammo­nia, urine has been used for stain removal since antiq­uity.

    4. נתר lye (active ingre­di­ent is potas­sium hydrox­ide)
      Liquid soap ingredient

      Potas­sium hydrox­ide pel­lets, used in the man­u­fac­ture of liq­uid soap.

    5. בורית com­mon soap­wort
      Soapwart -the gentle soap

      בורית, Soap­wort, known also as Saponaria, pro­duces a lath­ery soap that is known to to be gen­tle. It’s active ingre­di­ent is Saponin


    6. קימוליא Cimolean earth a fine earth used to absorb greasy impu­ri­ties


  1. אשלג Potash (active ingre­di­ent is pot­ta­sium car­bon­ate)

The for­mula is done one by one, in order, using מי רגלים with each of the lat­ter six, and scrub­bing the nega three times with each of the seven (mishna, Tal­mud zvachim 95a quot­ing Resh Lak­ish)

Digiprove sealCopy­right secured by Digiprove © 2013
Acknowl­edge­ments: Pot­ta­sium hydrox­ide image license: ht more…
All Rights Reserved