Message:

<p>[QUOTE=&quot;Dick Wood, post: 2216049, member: 1462&quot;]Improper cleaning daguerreotype plates can damage the image. From a paper by Thomas M. Edmondson &amp; Susan Barger. &quot;The Examination, Surface Analysis, and Retreatment of Eight Daguerreotypes which were Thiourea Cleaned in 1977 (1993).&quot; (published as a paper in &quot;Issues in the Conservation of Photographs&quot; By Debra Hess Norris, Jennifer Jae Gutierrez). &quot;Thiourea cleaning treatments were once considered safe, effective, and accepted procedures for the care of daguerreotypes. No finger of blame can be pointed at those who used this procedure before the Photographic Materials Group&#039;s moratorium on its use. Any uninformed dealer or collector today may be excused for its use, but they do need to be educated about the damage that this treatment inflicts on daguerreotypes. However, for any person who has been aware of both the concerns about this treatment that have been raised in many articles and presentations over the last ten years, there can be no excuse for the continued use of thiourea cleaners. Any doubts as to the damage caused by these treatments should now be erased, and it should be clear that it is no longer acceptable under any circumstances to continue to use thiourea treatments or to suggest their use. The information presented here clearly shows that thiourea treatments cause irreparable damage to [... ] daguerreotypes and that there are no circumstances when this treatment can be considered ethical.&quot;[/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