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{{short description|Layout stain used in metalworking}} |
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| ⚫ | '''Marking blue''' |
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{{distinguish|engineer's blue}} |
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{{More citations needed|date=February 2024}} |
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[[file:Engineers Blue Naomi SexyCyborg Wu 2019.png|thumb|Marking out a metal bar]] |
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| ⚫ | '''Marking blue''' or '''layout stain''' (sometimes called ''Dykem'' after [[trademark erosion]] of a popular brand, or ''[[Prussian blue]]'' after the blue pigment) is a [[dye]] used in [[metalworking]] to aid in [[marking out]] rough parts for further machining. It is used to stain or paint a metal object with a very thin layer of dye that can be scratched off using a [[scriber]] or other sharp instrument to reveal a bright, yet very narrow line in the metal underneath. |
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| ⚫ | Marking blue is made by mixing [[methylated spirit]]s with [[shellac]] and [[gentian violet]].<ref name="brink">{{Citation | last = Brink | first = C. | last2 = McNamara | first2 = B. | title = Engineering Fabrication & Boilermaking | page = 44 | publisher = Pearson South Africa | year = 2008 | url = |
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== Composition == |
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| ⚫ | A [[felt tip marker]] can be used as they are convenient and tend not to dry up as |
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| ⚫ | Marking blue is made by mixing [[methylated spirit]]s with [[shellac]] and [[gentian violet]].<ref name="brink">{{Citation | last = Brink | first = C. | last2 = McNamara | first2 = B. | title = Engineering Fabrication & Boilermaking | page = 44 | publisher = Pearson South Africa | year = 2008 | url = https://books.google.com/books?id=coOZXYLqqPoC&lpg=PA44 | isbn = 978-1-77025-374-2}}.</ref> <!-- Prussian blue with [[ethanol|alcohol]] to form a quick drying stain. <-Is this true? --> |
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{{Reflist}} |
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== Alternatives == |
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| ⚫ | A [[felt tip marker]] can be used as they are convenient and tend not to dry up as quickly. On rough structures, such as [[casting]]s or [[forging]]s, [[whitewash]] or a mixture of [[chalk]] and water can be used. A solution of [[copper sulfate]], [[distilled water]], and a few drops of [[sulfuric acid]] can be used on machined surfaces.<ref name="brink"/> |
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[[Category:Inorganic pigments]] |
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Latest revision as of 00:24, 19 February 2024
 | This article needs additional citations for verification. (February 2024) |
Marking blue or layout stain (sometimes called Dykem after trademark erosion of a popular brand, or Prussian blue after the blue pigment) is a dye used in metalworking to aid in marking out rough parts for further machining. It is used to stain or paint a metal object with a very thin layer of dye that can be scratched off using a scriber or other sharp instrument to reveal a bright, yet very narrow line in the metal underneath.
Composition
[edit]Marking blue is made by mixing methylated spirits with shellac and gentian violet.[1]
Alternatives
[edit]A felt tip marker can be used as they are convenient and tend not to dry up as quickly. On rough structures, such as castings or forgings, whitewash or a mixture of chalk and water can be used. A solution of copper sulfate, distilled water, and a few drops of sulfuric acid can be used on machined surfaces.[1]
References
[edit]- ^ a b Brink, C.; McNamara, B. (2008), Engineering Fabrication & Boilermaking, Pearson South Africa, p. 44, ISBN 978-1-77025-374-2.
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