Le lithopone a été découvert dans les années 1870 par DuPont. Il a été produit par la Krebs Pigments and Chemical Company, entre autres1. Il se faisait en différents grades, en fonction de la teneur en sulfure de zinc. Les qualités « bronze » et « or » contenaient 40 à 50 % de sulfure de zinc, ce qui les rendaient particulièrement couvrantes2. Bien que ce pigment ait atteint son pic de popularité autour de 1920, il s'en produisait encore annuellement plus de 220 000 tonnes en 1990. Il est principalement utilisé dans les peintures, les pâtes et les plastiques3.
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Fasteners must be properly torqued to the manufacturer's specifications to ensure that they provide the necessary clamping force to hold parts together securely Fasteners must be properly torqued to the manufacturer's specifications to ensure that they provide the necessary clamping force to hold parts together securely
The sharp threads of tek screws provide excellent grip and prevent loosening over time, ensuring a long-lasting and reliable connection The sharp threads of tek screws provide excellent grip and prevent loosening over time, ensuring a long-lasting and reliable connection
They can be easily installed in various configurations, allowing engineers to tailor their use according to the specific requirements of the project They can be easily installed in various configurations, allowing engineers to tailor their use according to the specific requirements of the project
Cost-Effective While resin bolt fixings may have a higher initial cost compared to metal fixings, they often offer longer life spans and reduced maintenance costs, resulting in overall cost savings over time Cost-Effective While resin bolt fixings may have a higher initial cost compared to metal fixings, they often offer longer life spans and reduced maintenance costs, resulting in overall cost savings over time
They provide a reliable connection that can withstand environmental factors and the test of time They provide a reliable connection that can withstand environmental factors and the test of time