韩国采购需求：碳酸钙、碳酸钙纳米颗粒、纳米碳酸钙、纳米碳酸钙价格、纳米材料

We are looking to source calcium carbonate powders in three different particle sizes: fine, medium, and coarse. These materials will be essential for our production processes, and we're interested in exploring your capabilities to supply them consistently. Please provide details regarding your availability, pricing, and any minimum order quantities. Additionally, it would be beneficial to understand the specifications and quality standards of your calcium carbonate products, particularly any certifications or testing methods you employ. We're eager to establish a reliable partnership, so any information on lead times and your production capacity would also be appreciated. Thank you for your prompt response!