Question

What is the material required for permanent staining?​

Answer 1

Answer:

The material after thorough washing is passed through the gradually increasing percentage of the medium in which stain is made e.g., since the borax carmine or picro-indigo-carmines are usually made in 70% alcohol the material should first be passed through 30% alcohol, 50% alcohol and 70% alcohol for at least 3

Explanation:

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Answer 2

Answer:

The material after thorough washing is passed through the gradually increasing percentage of the medium in which stain is made e.g., since the borax carmine or picro-indigo-carmines are usually made in 70% alcohol the material should first be passed through 30% alcohol, 50% alcohol and 70% alcohol for at least 3

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