南非采购需求：直接染料、酸性染料、碳酸钠、棉质直接染料、直接染料色卡、直接染料用途

I'm looking for a reliable supplier for 2kg of oil-soluble black dye. Ideally, I need a product that meets high-quality standards and can be used in various applications. Please provide me with your specs, including purity levels, color strength, and any certifications associated with the dye. It's important that your product performs well across different environments. Additionally, I'd like to know about your pricing, lead times, and minimum order quantities. If you have any existing customers or case studies related to this dye, that would be great to review as well. Please let me know if you can accommodate my request and provide any additional information that might help in making a decision.