Message:

<p>[QUOTE=&quot;calcol, post: 2765291, member: 77639&quot;]We need think about aqueous solutions and suspensions too.&nbsp; Things like coffee, cola, milk, honey, jelly, etc.&nbsp; ... yes, even beer.&nbsp; Good chance these have gotten on planchets or dies.&nbsp; Perhaps these things are confined to the lunchroom today, but in the past, mint workers probably could take their drinks and snacks into the machinery rooms.&nbsp; Not too big a stretch to imagine a bottle of cola or cup of coffee falling into a bin of planchets&nbsp; ... sometimes maybe with a little deliberate help.&nbsp; Having solutes or particles in the water can make a big difference.&nbsp; Evaporation rates can be dramatically lower, the liquid may form a higher-domed bead, viscosity will be increased, particles or crystals may start to precipitate, solutes may react with metal, adhesion of the bead to metal may be greater, etc.&nbsp; Put a drop of pure water and sugared cola on a quarter, and see which lasts longer and which leaves a residue.</p><p><br /></p><p>Cal[/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