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Raven Labs, a leading supplier of biological and chemical indicators, announces the release of ProChem EXT, an extended timing steam Class 5 Chemical Integrating Indicator. ProChem EXT changes from its green color to black upon exposure to adequate sterilization conditions for 7 minutes at 135Â°C (275Â°F) and 20 minutes at 121Â°C (250Â°F) representing an overkill or extended cycle with timing beyond that of a typical biological indicator. More information is available at www.ravenlabs.com. Raven is a division of Mesa Laboratories