Message:

<p>[QUOTE=&quot;rmpsrpms, post: 3443229, member: 31773&quot;]In clean environments, such as wafer fabs or optics manufacturing, distilled water (or de-ionized water) is used for cleaning and surface etching. Very clean DI or distilled water has etching properties that are inhibited by ionic contaminants. However, this is somewhat moot since the coins in these experiments are quite dirty, and even if distilled water is used, it will be quickly contaminated by the materials it is dissolving from the surface of the coin. </p><p><br /></p><p>Keep in mind though that tap water today contains chloramine (a mix of chlorine and ammonia) and this mixture is chemically reactive. So if you are OK with rinsing your coins in chlorine and ammonia, then go ahead and use tap water. If those chemicals give you pause (which they do me) then I would suggest sticking with distilled.[/QUOTE]</p><p><br /></p>

Your name or email address:

Do you already have an account?

• No, create an account now.
• Yes, my password is:
• Forgot your password?

Stay logged in