B e n c h m a r k
B e n c h m a r k
(test 1 of 5)
Oddy Test Results for 5 samples of Felt as follows:
9/21/02
An Oddy test was conducted on four samples of dry felt and one sample of felt with adhesive backing. The test procedure was as follows: The samples were enclosed in a separate glass vial with blanks of polished lead, silver and copper. Half of the sample was placed beneath the blanks so that any affect of direct contact as well as volatile contaminates could be assessed. Moist cotton was placed in the test vial, which was then scaled and exposed to 55oC for 33 days.
A control vial was prepared in the same manner, without any sample, and exposed to the same conditions.
| DAY | SAMPLE NUMBER | OBSERVATION | |
| 1-33 | Sample K1: black felt | 31-111BK Black | No change in test blanks. |
| 1-33 | Sample K2: tan felt | 31-111TN Tan | No change in test blanks. |
| 1-33 | Sample K3: silver felt | 31-111CG Cool Grey | No change in test blanks. |
| 1-33 | Sample K4: brown felt | 31-111DB Dark Brown | No change in test blanks. |
| 1-33 | Sample K5: white felt w/ adhesive | 31-111WH White | No change in test blanks. |
| 1-33 | Control | No change in test blanks. |
INTERPRETATION OF RESULTS
Based on the test results, the investigator would use the felt for padding
mounts and similar applications.
(test 2 of 5)
Oddy Test Results for 3 samples of Felt as follows:
9/11/01
TEST PROCEDURE: Oddy
An Oddy test was conducted on three samples of felt fabric. The test procedure was as follows. Each sample of the felt was enclosed in a separate glass vial with blanks of polished lead, silver and copper. Half of the sample was placed beneath the blanks so that any affect of direct contact as will. as volatile contaminates could be assessed. Moist cotton was placed in the test vial, which was then sealed and exposed. to 55oC for 35 days.
A control vial was prepared in the same manner, without any sample, and exposed to the same conditions. I .
| DAY | SAMPLE NUMBER | OBSERVATION | |
| 1-35 | Sample 1: white without adhesive | No Change in test blanks. | |
| 1-35 | Sample 2: white with adhesive | No Change in test blanks. | |
| 1-35 | Sample 3: ivory with adhesive | 31-111IV Ivory | No Change in test blanks. |
| 1-35 | Control | No Change in test blanks. |
INTERPRETATION OF RESULTS
Based on the test results, the investigator would use these materials.
(test 3 of 5)
Oddy Test Results for 2 samples of Felt as follows:
1/4/99
TEST PROCEDURE: Oddy
An Oddy test was conducted on two samples of felt fabric. The test procedure was as follows. Each sample of the felt was enclosed in a separate glass vial with blanks of polished lead, silver and copper. Half of the sample was placed beneath the blanks so that any affect of direct contact as will. as volatile contaminates could be assessed. Moist cotton was placed in the test vial, which was then sealed and exposed. to 55oC for 40 days.
A control vial was prepared in the same manner, without any sample, and exposed to the same conditions. I .
| DAY | SAMPLE NUMBER | OBSERVATION | |
| 1-40 | Sample 1: tan | 31-111WG Warm Grey | No Change in test blanks. |
| 1-40 | Sample 2: brown | 31-111CN Chestnut | No Change in test blanks. |
| 1-40 | Control | No Change in test blanks. |
The samples caused no noticeable change in the metal blanks
used in the tests. All samples were found to be
colorfast to water.
(test 4 of 5)
Oddy Test Results for 9 samples of Felt as follows:
9/22/98
An Oddy test was conducted on seven samples of felt fabric and two samples of black felt, one with adhesive backing. The test procedure was as follows: Each sample was enclosed in a separate glass vial with blanks of polished lead, silver and copper. Half of the sample was placed beneath the blanks so that any affect of direct contact as well as volatile contaminates could be assessed. Moist cotton was placed in the test vial, which was then scaled and exposed to 55oC for 48 days.
A control vial was prepared in the same manner, without any sample, and exposed to the same conditions.
|
DAY |
SAMPLE NUMBER |
OBSERVATION |
|
|
1-48 |
Sample 1: burgundy |
No change in test blanks. |
|
|
1-48 |
Sample 2: white |
No change in test blanks. |
|
| 1-48 | Sample 3: green | 31-111DG Dark Green | No change in test blanks. |
|
1-48 |
Sample 4: brown |
No change in test blanks. |
|
|
1-48 |
Sample 5: yellow ochre brown |
Very slight tarnish on silver blank. |
|
| 1-48 | Sample 6: sienna brown | 31-111LB Light Brown | No change in test blanks. |
|
1-48 |
Sample 7.a.: black without adhesive |
No change in test blanks. |
|
|
1-48 |
Sample 7. b.: black with adhesive |
No change in test blanks. |
|
|
1-48 |
Sample 8: gray |
No change in test blanks. |
|
|
1-48 |
Control |
No change in test blanks. |
INTERPRETATION OF RESULTS
Sample 5 did show very slight tarnish of the silver blank beginning on day 36 of the test. This corrosion continued to be very slight and gradual and only occurred on the area of the blank left uncovered. In other words, no corrosion occurred in the area covered by the sample. The nature of the corrosion leads the investigator to believe that the corrosion may have resulted from a leak in the seal of the vial as opposed to volatile emissions from the sample. Based on these test results. the investigator would use all the fabrics in an exhibit case.
All samples were found to be colorfast to water.
(test 5 of 5)
Oddy Test Results for 1 sample of Felt as follows:
5/5/04
An Oddy test was conducted on
one sample of cool grey felt with and without adhesive backing. The test
procedure was as follows: This material was tested for volatile compounds which
may create corrosion in display or storage using a variant of the standard "Oddy
test". The production of volatile compounds was tested by isolating each
sample to be tested in an air-tight glass vessel with polished metal coupons of
lead, copper and silver. Distilled water was included in each vial to provide
high relative humidity and accelerate any chemical reactions. A control set of
coupons was also included. All coupons were exposed to temperatures of 40oC
for a period of forty-eight days.
After this time period the coupons were removed and examined using a bench
stereo microscope to asses the extent of corrosion.
This procedure was augmented by use of the sodium azide test employing cut
fragments of the fabric exposed under glass to the sodium azide test reagent for
3-4 minutes while examining the extent of the reaction with a microscope with a
control sample of hair as a standard.
INTERPRETATION OF RESULTS
5a:
Control: no corrosion, oxidation or alteration was noted on the
silver, copper or lead coupons.
One sample
of cool grey felt with adhesive backing: no
corrosion, oxidation or alteration was noted on any of the silver, copper or
lead coupons; no change due to the proximity of the fabric noted, in particular
in the adhesive backing. Contact of the adhesive backing with silver resulted in
the backing discoloring to a brownish color but no corrosion had occurred to the
silver due to the adhesive. This may simply be due to catalytic action of
the silver on the adhesive in conditions of high humidity and does not appear to
be any impediment to normal use.
Sodium azide test: no release of nitrogen, from which can be inferred that no
reactive sulfur compounds are present in the material. This material therefore
passed the sodium azide test.
CONCLUSIONS
This fabric test indicates that the fabric tested is safe in
close proximity to art objects.
5b:
Control: no corrosion, oxidation or alteration was noted on the silver, copper
or lead coupons.
One sample
of cool grey felt without adhesive backing: no
corrosion, oxidation or alteration was noted on the silver, copper or lead
coupons; no change due to the proximity of the fabric noted.
Sodium azide test: no release of nitrogen, from which can be inferred that no
reactive sulfur compounds are present in the material. This material therefore
passed the sodium azide test.
CONCLUSIONS
This fabric test indicates that the fabric tested is safe to use
in close proximity to art objects.
Requested by Benchmark, Rosemont, N.J. 08556