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National Center for Preservation Technology & Training
NCPTT
National Park Service
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Cultural Resources
U.S. Department of the Interior
Identification of Unmarked Graves
Comparitive Study of Commercially Available Cleaners for Use on Federally-Issued Headstones
1. Executive Summary
2. Background
3. Phase One of Study
3.1 Choice of Cleaners
3.2 Choice of Cemeteries
3.3 Selection of Headstones
3.4. Evaluation Methods for Change in Appearance and Biological Activity
3.5.1.Documentation of Headstones
3.5.3. Cleaning Headstones
3.5.5 Follow-up Biological Activity, June 2006 Report
4. Phase Two of the Study
5. Current Research Activities
5.1.1.1. Thirty-Three Day Cleaning Study
5.2. Field Studies
5.3. Methods of Analysis
5.3.3.1. Optical Microscopy
6. Comments and Discussion
Cemetery Monument Conservation
New England Cemetery Monument Conservation Workshop: Oct. 7-9, 2008
Video: Cleaning a Stone Grave Marker
Video: Iron Fence Repair
Video: Resetting a Stone Grave Marker
Video: TELNPS Basics in Iron Fence Care
Video: TELNPS Essentials in CMC
Video: TELNPS Essentials in CMC (2007)
2007: CMC Photos
2007: CMC Basics Workshop: San Antonio
2007: Southeast CMC Workshop
Application and Preparation of Limewash Video
Durability of Traditional and Modified Limewashes
Introduction
Scope of the Study
Background
Laboratory Testing
Results of the Study
Discussion
Conclusions
Limewash: Handmade and Modern Brick
Introduction
Testing Methods
Test Results: Handmade Bricks
Test Results: Modern Brick
Recommendations
Limewash Recipes
Limewash Recipes Matrix
QUV Artificial Weathering
Adhesion by Tape Test
Abrasion by Falling Sand
Results
Solids Test
Measuring Adhesion by Tape Test
Abrasion Test
QUV Samples
Colorimetry
Adhesion Test on QUV Samples
Abrasion Test on QUV Samples
Limewash: Weathered & Rough-Sawn Wood
Limewash Recipes
Limewash Recipes Matrix
QUV Artificial Weathering
Adhesion by Tape Test
Abrasion by Falling Sand
Results
Solids Test
Measuring Adhesion by Tape Test
Abrasion Test
QUV Samples
Colorimetry
Adhesion Test on QUV Samples
Abrasion Test on QUV Samples
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Abrasion by Falling Sand
Abrasion by Falling Sand
Abrasion Testing Procedure
Assemble the apparatus so that the sample holder is directly in-line with the sand tube and funnel, and so that the large collection bin is able to trap all used sand.
Choose sample to abrade and mount it in holder directly under the outlet tube, so that the center of the flow will hit the center of the sample.
Position the sample so that the nearest portion of it to the end of the outlet tube is exactly one (1) inch from the outlet tube.
Fill the one liter beaker with sand to exactly the 1000 mL mark.
Load the upper funnel with the sand, thus allowing sand to abrade the sample.
Record each 1L of sand used.
Repeat steps 4 through 6 until the sample begins to show substrate, but empty the collection bin of its sand before the sand "backs up" onto the sample.
Once substrate begins to show, switch to using 250 mL at a time by using the plastic beaker.
Make sure to
record exactly the total volume of sand
used.
The run is complete once a patch of substrate is exposed that measures 4mm in diameter (no more, no less). Use the longest diameter if the patch is not circular.
The final piece of data for each sample is then the volume of sand required to expose a 4mm diameter patch of substrate.