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<p>[QUOTE=&quot;Insider, post: 2398935, member: 24314&quot;]<span style="color: #00b300">I&#039;ll take a stab on this based on my new understanding.</span></p><p><br /></p><p>Isn&#039;t corrosion describing the effect, and patina is the layer and color that forms? <span style="color: #00b300">Corrosion, patina, verdigris, toning, etc. are all physical manifestations of oxidation.&nbsp; All of the above characteristics can be said to affect the surface (raised or into).&nbsp; However, they are usually regarded differently.&nbsp; Patina is often used to describe &quot;pretty&quot; corrosion.&nbsp; Just as tarnish is used to describe &quot;ugly&quot; toning.&nbsp; </span> And, maybe verdigris is a type of patina - one that easily falls off.&nbsp; <span style="color: #00b300">Apparently, verdigris is just another word for a similar product of oxidation.&nbsp; A quick look on the Internet shows objects with pretty verdigris and some that are just plain corrosion! </span></p><p>The dictionary definitions use &quot;patina&quot; in its description of verdigris.</p><p><span style="color: #00b300">True, the two words seem to be interchangeable.&nbsp; Nevertheless, I think &quot;patina&quot; conjures up something more &quot;favorable.&quot;</span></p><p>So, isn&#039;t verdigris a layer that forms that easily falls off, whereas toning has a stronger bond?&nbsp; <span style="color: #00b300">IMO, toning is a strong bond; however some forms of toning (color) will wipe off a surface.&nbsp; Patina or verdigris is also a strong bond as the metal is being destroyed at the point of contact. The fact that it can be powder-like on its top surface is just like more familiar rust.&nbsp; The metal has &quot;brown colored rust (patina)&quot; and in many cases the top layer can be rubbed off like a powder.&nbsp; NOW, patina or verdigris should not be used to describe a brown surface (as my example) as it refers to green and blue coloration.&nbsp; Sorry to add this: Right or wrong - glossy brown ancient coins have been described as having &quot;patina.&quot; <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie46" alt=":facepalm:" unselectable="on" unselectable="on" />&nbsp;&nbsp; </span></p><p><br /></p><p>------</p><p><br /></p><p>Doesn&#039;t that mean they are types of, from more general to more specific:</p><p>Corrosion &gt; Patina &gt; Verdigris &amp; Toning</p><p>The above would be easier to see in a &quot;tree-branch&quot; diagram.</p><p>Is the above correct, below the dashed lines? <span style="color: #00b300">I think rather than a progression they are technically all the same thing.</span></p><p><span style="color: #00b300"><br /></span></p><p><span style="color: #00b300">If there are no misstatements here, I think I finally &quot;get it.&quot;<img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie20" alt=":banghead:" unselectable="on" unselectable="on" /></span></p><p><span style="color: #00b300"></span>[/QUOTE]</p><p><br /></p>

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