美国采购需求：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 interested in sourcing Sulphur Black for our upcoming projects. Could you provide details on your available grades, including specifications and quality standards? Also, please include pricing for bulk orders and any minimum order quantities. Additionally, it would be helpful to know your production capacity and lead times for delivery. If you offer samples for testing purposes, I'd appreciate that info too. Looking forward to your prompt response as we aim to finalize our supplier soon!