In 1970, Japanese scholars studied the phase diagram of iron oxide microcrystalline formation, which laid a theoretical foundation for the preparation method of iron oxide yellow crystal seed. According to the research results, iron yellow crystal seeds can be formed under acidic or alkaline conditions. Because iron yellow is a crystal structure, in order to crystallize into pigment particles, it must first form crystal nucleus and become crystal seed, and then the crystal nucleus grows into iron yellow. Otherwise, only thin and dim color paste can be obtained, which does not have pigment properties. Acid process can be divided into iron sheet process and drop addition process.
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2025-08-14 14:11
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Made from high-quality materials, these screws are able to withstand the elements and resist corrosion, making them ideal for outdoor projects or areas where moisture is a concern Made from high-quality materials, these screws are able to withstand the elements and resist corrosion, making them ideal for outdoor projects or areas where moisture is a concern
The distance between each stud should not exceed certain limits to ensure uniform distribution of stress The distance between each stud should not exceed certain limits to ensure uniform distribution of stress
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