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<p>[QUOTE=&quot;Just Carl, post: 145020, member: 4552&quot;]Gel packs are nice but limited to useage in small confined areas only. If your coins are in a house just get one of those things called a dehumidifier. I keep most of my coins in my basement and live in a highly humid area. One large dehumidifier works just great. As an experiment I hung large gel packs all over the basement for about a month. My Hygrometer registered a never ending 45 % and at times during outside rain it jumped up to 60 % for a few days. Put the dehumidifier back on and the hygrometer registered 25 % in a few days. As to plastic tubes if they are dangerous to coins it&#039;s news to me. I&#039;ve had some in them since about the 1960 ara. I&#039;ve been putting all denominations in them for many, many years. Regarless of the material they are composed of they will not effect the coins unless exposed to high temperatures. Most, not all, plastics are stable compounds and do not effect matallic items such as coins unless exposed to sufficient temperatures to insite a reaction or melting. </p><p>The usage of any paper product for long term storage of coins is not a great idea. Paper is pourous and the slightest gases that could react with the metal of a coin could and will penitrate the paper. So unless the paper rolled coins are kept in a stable, moisture free atmosphere, they will eventually be effected.</p><p>As to aluminum foil, if any one does use this for storage they must make sure of little to no temperature changes. It does work but if there are constant temperature changes, the coins will be effected by a thing called electrolysis. Any time any two dissimilar metals touch each other they create a flow of electrons which is for a short period of time trivial. But for long terms and with temperature changes the coins will be distroyed. This is the principal of a thermocouple as used in piping, duct work and large machines all over the world. An example is the duct work at a power station where a thermowell is inserted into the duct. This is then followed by two dissimilar wires connected at that point. For every degree of temperature change an electron flow goes through the wires to a gauge at the control board indicating that change. </p><p>Back to the plastic rolls. I&#039;ve got approximately 500 plastic rolls of coins and no problems of any kind.[/QUOTE]</p><p><br /></p>

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