Goulac
Goulac, also known as Glutrin, is a core binder developed from wood pulping. It is made from lignin pitch.[1]
The material has a dark colour and is soluble in water.[2]
Goulac water was used to make Gallagher sharp sand.[3] It was trademarked in the 1940s.[1] It prevents a chemical reaction between lead arsenate and lime sulphur.[4]
When used to make mold cores from sand, it results in a very hard surface after baking, however the sand can absorb moisture if the core is not used soon after being prepared.[5] Use of Goulac allows the cores to be baked at a lower temperature compared to other types of binders.[5]
Glutrin was used in road paving in the early 20th century.
See also
[edit]References
[edit]- ^ a b "Goulac Trademark - Registration Number 0509784 - Serial Number 71558985 :: Justia Trademarks". trademarks.justia.com.
- ^ "Goulac Core Binder". Hill and Griffith. Retrieved 18 February 2019.
- ^ "Western Machinery and Steel World". February 16, 1922 – via Google Books.
- ^ "Miscellaneous Publication". U.S. Department of Agriculture. February 16, 1930.
- ^ a b Personnel, United States Bureau of Naval Personnel (1952). Molder 3 & 2. U.S. Government Printing Office. p. 182.