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When blood dries the hemoglobin turns into methemoglobin which cannot carry oxygen. How does methemoglobin affect...

When blood dries the hemoglobin turns into methemoglobin which cannot carry oxygen. How does methemoglobin affect blood’s ability to be removed from fabric compared to hemoglobin in fresh blood?

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The blood clots when exposed to air, because of its hemoglobin content. This property also allows it to bind to the cloth or fabric on which it is spilled. This makes it difficult to remove blood from fabric. This increases while the blood dries into its methemoglobin form. Cleaning a fresh blood stain from fabric is much easier. Cleaning dried blood from fabric would thus require extensive measures like scrubbing with soap, compared to just rinsing with water, for a fresh blood stain.

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