Question
Download Solution PDFMarking media used for casting & forging surfaces is ________.
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFExplanation:
Marking media is a substance that is applied on the surface of the metal to distinct the marked line clearly.
Different marking media are whitewash (chalk powder), Prussian blue, Copper sulphate, and cellulose Lacquer.
- Whitewash/Chalk powder is applied to rough forging and casting surfaces. It is not recommended for workpieces of high accuracy.
- Prussian Blue is used on filed or machine-finished surfaces. This will give very clear lines but takes more time for drying than the other marking media.
- Copper Sulphate is used on filed or machine-finished surfaces. It sticks to the finished surfaces well. It is poisonous, so needs to be handled carefully.
- Cellulose Lacquer is a commercially available marking medium. It is made in different colors and dries very quickly.
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