This method is for identifying papers and boards that will tarnish or stain silver or other metallic items. The appearance of the tarnish or stain is reported, together with the distri-bution of the tarnishing or staining. Reducible sulfur activity is a common cause of tarnishing.
Certain types of paper, such as water repellent types and metal coated papers, may require a modification of the test procedure. In most cases, water repellant or metal-coated samples may be tested without wetting the test
specimen and by prolonging the time in contact with the silver to at least 24 h. When such sample types are tested, state
any modification of the procedure which is used in the report.
The principles involved in this test method might be used to test samples for their staining or corrosion
properties with respect to other metals, such as steel, copper, nickel, brass, etc. In such cases, it is necessary to use plates
or forms of the particular metal or alloy in question and to make such modifications as may be required for the particular
purpose. For example, in the case of metal that would rust, the paper might not be wetted; it could instead be heated in an
atmosphere of high humidity.
| ANSI : | ANSI Approved |
| File Size : | 1
file
, 36 KB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 4 |
| Published : | 2012 |
| Redline File Size : | 2
files
, 360 KB |
