About Harboro Rubber Engineering in Rubber      Contents      Introduction      Uses of Rubber      Processing Rubber      Designing With Rubber      Selecting / Specifying Rubber      Quality In Rubber      Rubber Directory      Health & Safety      Measuring Properties          Measuring Properties          Measuring Hardness          Tensile Strength          Elongation          Modulus          Compression Set          Permanent Set (Tensile Set)          Density (Specific Gravity)          Resilience          Chemical Resistance          Fluid Resistance          Weather Resistance          Ozone Resistance          Electrical Properties          Tear Strength          Abrasion Resistance          Electric Strength          Flame Resistance          Low Temperature          Staining          Accelerated Ageing      Glossary of Terms      Request A Copy Contact Information

Staining   Property: Staining Method of Measurement: The staining of organic finishes is measured by placing a sample of the rubber against a clean sample of the organic finish and applying pressure for a period of time at a given temperature. The sample is then removed and the organic finish examined for evidence of staining or discolouration. Results are recorded as staining or non-staining. It is normal to give a description of any staining that is observed. ASTM REFERENCE: D925 BS REFERENCE: BS903 Part A33 ISO REFERENCE: ISO3865** * technically equivalent ** identical