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We are one of local ink manufacturer in Indonesia, named PT Colorpak Indonesia. Further about our company are available at our company website, www.colorpak.co.id . Currently we are looking for carbon black for polyamide surface printing ink. Could you recommend us your cheapest carbon black (not rubber grade)? Could you also send sample a n d quotation of the grade ZG 80 Carbon Black ? Thank you for your attention a n d cooperation.