[Jewelry making - Article 00506] - Re: [Orchid] Distilled vs. Deionized water

[John Burgess]

========[ Invite a Friend - http://www.ganoksin.com/invite.htm  ]========

    G'day; When tap water is distilled, any bacteria, viruses and other
    such nasties are killed by the 100C heat. Oh yes; there are a few
    bacteria which can live at temperatures of 100C or a little higher,
    but you are unlikely to find any in tap water. I have worked in
    laboratories, some of which did very accurate chemical analyses most
    of my life, and all had their own professionally made. continuous
    water stills. I tested the water every day and never found anything
    likely to affect our work. If water is distilled in enclosed
    equipment, it cannot absorb anything other than carbon dioxide from
    the atmosphere and a little air. If sterile water is essential; as
    for work with bacterial cultures, or for medical purposes, then
    heating in enclosed vessels which are contained in autoclaves or
    even good quality domestic pressure cookers which attain a
    temperature of 121C will completely sterilise it. I can prove this. 

    If the distilled water is kept in a stoppered vessel it cannot
    deteriorate. It cannot corrode any common metal. It may contain tiny
    amounts of volatiles, so really analytical quality distilled water is
    first heated with a powerful oxidising agent such as potassium
    permanganate. However, if water contains a lot of carbon dioxide,
    like rain; dilute and mild carbonic acid will be produced and
    corrode copper and other metals, also limestone This latter producing
    'hard' water which needs more soap to generate a lather with soap.
    Such acid water carves all the huge limestone caves and passages
    De-ionised water is not at all the same.- 

Cheers for now,
JohnB of NZ
____________________________________________________________________
T h e   O r c h i d   L i s t
Open Electronic Forum for Jewelry Manufacturing Methods and Procedures
____________________________________________________________________
Orchid FAQ:
~ http://www.ganoksin.com/orchid/faq.htm
Orchid Archives:
~ http://www.ganoksin.com/orchid/archive
Orchid Galleries:
~ http://www.ganoksin.com/orchid/gallery.htm
Invite a Friend:
~ http://www.ganoksin.com/invite.htm
____________________________________________________________________
Tips From The Jeweler's Bench - Article Archive
~ http://www.ganoksin.com/borisat/tip_sear.htm
The Jeweler's Selected Bibliography List
~ http://www.ganoksin.com/jewelry-books
Buy Orchid Jewelry:
~ http://www.ganoksin.com/shop
____________________________________________________________________
-Unsubscribe:
-Email: orchid-request AT ganoksin.com Body=unsubscribe subject=blank
____________________________________________________________________