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<p>[QUOTE=&quot;Just Carl, post: 229661, member: 4552&quot;]Those are used at many Engineering firms where any inking is used. The pen tips get blocked up with dryed ink and they are submerged in the Ultra Sonic type cleaners utilizing only water. The combinations of this system breaks out the ink, clears the tips and presto, back to work. All the ones we have do have plastic type baskets for the suspension of the pen tips. 00 tips are delicate and if bounced to hard become useless. For coins I&#039;ve tried them in just pure water for really dirty coins. The dirt breaks off, the coins as a rule come out fairly undamaged. However, this is only with modern types of coins. Older coins may have any contaminates actually now part of the metal of the coins and removal of such contaminates also removes part of the coin. The instructions that come with our units do NOT recommend additions of any chemicals other than water.[/QUOTE]</p><p><br /></p>

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