<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<meta name="Generator" content="Microsoft Word 15 (filtered medium)">
<style><!--
/* Font Definitions */
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0cm;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri",sans-serif;
mso-fareast-language:EN-US;}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:#0563C1;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:#954F72;
text-decoration:underline;}
p.MsoListParagraph, li.MsoListParagraph, div.MsoListParagraph
{mso-style-priority:34;
margin-top:0cm;
margin-right:0cm;
margin-bottom:0cm;
margin-left:36.0pt;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri",sans-serif;
mso-fareast-language:EN-US;}
span.Meililaad17
{mso-style-type:personal-compose;
font-family:"Calibri",sans-serif;
color:windowtext;}
.MsoChpDefault
{mso-style-type:export-only;
font-family:"Calibri",sans-serif;
mso-fareast-language:EN-US;}
@page WordSection1
{size:612.0pt 792.0pt;
margin:70.85pt 70.85pt 70.85pt 70.85pt;}
div.WordSection1
{page:WordSection1;}
/* List Definitions */
@list l0
{mso-list-id:1702826373;
mso-list-type:hybrid;
mso-list-template-ids:1857705438 69533713 69533721 69533723 69533711 69533721 69533723 69533711 69533721 69533723;}
@list l0:level1
{mso-level-text:"%1\)";
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;}
@list l0:level2
{mso-level-number-format:alpha-lower;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;}
@list l0:level3
{mso-level-number-format:roman-lower;
mso-level-tab-stop:none;
mso-level-number-position:right;
text-indent:-9.0pt;}
@list l0:level4
{mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;}
@list l0:level5
{mso-level-number-format:alpha-lower;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;}
@list l0:level6
{mso-level-number-format:roman-lower;
mso-level-tab-stop:none;
mso-level-number-position:right;
text-indent:-9.0pt;}
@list l0:level7
{mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;}
@list l0:level8
{mso-level-number-format:alpha-lower;
mso-level-tab-stop:none;
mso-level-number-position:left;
text-indent:-18.0pt;}
@list l0:level9
{mso-level-number-format:roman-lower;
mso-level-tab-stop:none;
mso-level-number-position:right;
text-indent:-9.0pt;}
ol
{margin-bottom:0cm;}
ul
{margin-bottom:0cm;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]-->
</head>
<body lang="ET" link="#0563C1" vlink="#954F72">
<div class="WordSection1">
<p class="MsoNormal">Hi<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Two question on the material use for collection storage room walls, floors and ceilings:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="mso-list:Ignore">1)<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>Is using PVC-flooring in fluid collection and in areas where people work with collections ok?<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="mso-list:Ignore">2)<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>Our new collections floors are planned to have concrete floors treated with
<a href="https://convergentconcrete.com/products/pentra-guard-ext">Pentra-Guard</a>. In description I read it is based on lithium.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Some of the information I have found this far:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I found this in NPS Museum Handbook:<o:p></o:p></p>
<p class="MsoNormal">„Treat concrete floors with a sodium silicate sealing/curing agent. This hardens and increases the density of the surface of the concrete, helping protect it from cracking, dusting, and other damage. The floor should be easy to clean without
the use of chemical cleaners or water“<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">And also an short introduction of an article about lithium chloride:<o:p></o:p></p>
<p class="MsoNormal">„UTILIZATION OF LITHIUM CHLORIDE SOLUTIONS FOR CONTROLLING RELATIVE<o:p></o:p></p>
<p class="MsoNormal">HUMIDITY IN MICRO ENVIRONMENTS<o:p></o:p></p>
<p class="MsoNormal">BEYER, SARAH R. and STEPHEN L. WILLIAMS, Museum of Texas Tech University, Lubbock,<o:p></o:p></p>
<p class="MsoNormal">Texas 79409-3191<o:p></o:p></p>
<p class="MsoNormal">The utilization of saturated salt solutions at known temperatures has been used by the museum<o:p></o:p></p>
<p class="MsoNormal">community for establishing desired relative humidities in microenvironments. To alleviate the<o:p></o:p></p>
<p class="MsoNormal">expense of acquiring different chemicals, the authors investigated the feasibility of using different<o:p></o:p></p>
<p class="MsoNormal">concentrations of lithium chloride for establishing and controlling relative humidity. Much of the<o:p></o:p></p>
<p class="MsoNormal">information about the relationship between concentration and relative humidity was extrapolated<o:p></o:p></p>
<p class="MsoNormal">from the literature. Subsequent testing demonstrated the usefulness of this information and how it<o:p></o:p></p>
<p class="MsoNormal">might be used for initiating controlled changes in microenvironments.“<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="color:black;mso-fareast-language:ET">Kõike head soovides<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black;mso-fareast-language:ET">Lennart Lennuk<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black;mso-fareast-language:ET">Kogude osakonna juhataja<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black;mso-fareast-language:ET">Eesti Loodusmuuseum<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black;mso-fareast-language:ET">(+372) 6603404, 56569916<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
</body>
</html>