METHOD FOR TESTING DISCOLORING OF COPPER OR COPPER ALLOY PLATE

PURPOSE: To provide a discoloring test method by which the possibility or degree of occurrence of overlaying discoloring can be tested just after the completion of copper or copper alloy plate product is completed in the case where copper or copper alloy plates are overlaid and stored for several we...

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Bibliographische Detailangaben
Hauptverfasser:	MORI KENSAKU, NANBA NAOMI
Format:	Patent
Sprache:	eng
Schlagworte:	INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES MEASURING PHYSICS TESTING
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Beschreibung
Zusammenfassung:	PURPOSE: To provide a discoloring test method by which the possibility or degree of occurrence of overlaying discoloring can be tested just after the completion of copper or copper alloy plate product is completed in the case where copper or copper alloy plates are overlaid and stored for several weeks to several months. CONSTITUTION: The title method is used for testing the discoloring of copper or copper alloy plate by forming an overlaying face between at least one plate of copper or copper alloy, a transparent or translucent plate with clean surface and exposing it in an atomosphere of high temperature of at least 40 deg.C and humidity of at least 70%.