Discover our sustainable solutions for the leather industry. Royal Smit & Zoon is committed to continue to develop new products and solutions throughout our product offering as each drop makes a difference. Optitan The Optitan range of products which are highly concentrated, low salt, synthetic retanning agents, allowing a reduction of product usage, lower environmental impact and reduction of cost of effluent treatment: Optitan VD 727 Optitan TD 636 Optitan XD 828 Safetan Our Safetan Range consists of products that exceed the latest standards concerning free monomers (such as formaldehyde, phenol) and all restricted substance chemicals: Safetan BB 003 Safetan DD 001 Satetan MM 002 Safetan MW 005 Product Passport Our Product Passport is an easy to use tool, containing data on the performance of every wet-end chemical and its effect on both leather and the environment. read more ecoSimplicity in wet end leather manufacturing. ecoSimplicity is your helping hand to boost the efficiency of post-tanning operations and to enable an environmentally friendly leather production at the same time. Read more Do you want to know more about this topic? Contact us