Leather Tanning Agents The Quebracho Colorado extracts and its derivates are worldwide known since 1900's as natural products that allow tanners to produce a wide variety of tanned leather with a natural feel and a beautiful look. Unitán, with its two factories ISO 9001-2000 certified, has the world's bestselling vegetable extract product line. Our vegetable extracts are environmentally- friendly and give our customers the best choice for their leather production in a natural way. Spray Dried Solubles Tannins Filter Method % Min* Insoluble % Max Moisture % Max Lovibond Colour Red/Yellow >Ph Ash % Máx ATO 72 ± 2 - 9.00 1,9 - 2,2 / 3,8 - 4,2 4,7-5,3 7.5 ATG 72 ± 2 - 9.00 1,9-2,2 / 4,5-5,5 4,4-5,7 7.5 LIGHTAN ATO 70 ± 2 3.00 9.00 1,1 - 1,9 / 2,2 - 3,5 4,0-4,6 6.0 TEQUEBRAC P 69 ± 2 - 9.00 1,9-2,4 / 4,6-5,6 4,5-5,1 9.5 TEQUEBRAC L 69 ± 2 - 9.00 1,8-2,6 / 2,9-3,9 4,5-5,1 11.5 UNIQUE JR 48 ± 2 - 9.00 1,4-2,5 / 2,5-4,6 3,9-4,8 25.0 UNIQUE CHD 70 ± 2 3.00 9.00 1,8-2,9 / 4,0-6,0 4,0-4,7 7.5 Spray Dried Semi Solubles Tannins Filter Method % Min* Insoluble % Max Moisture % Max Lovibond Colour Red/Yellow >Ph Ash % Máx ATS 68 ± 2 4.50 9.00 2,2-2,9 / 3,9-4,8 4,2-5,0 4.50 ATD 68 ± 2 4.50 9.00 1,1-1,7 / 2,2-2,9 4,1-4,7 4.50 SUPERIOR ATO 70 ± 2 10.00 9.00 3,7-4,5 / 8,0-9,9 4,1-4,7 2.0 UNIQUE CHA 66 Mín. 4.00 9.00 2,0-3,2 / 5,8-10,2 3,4-4,0 7.2 Solid Solubles Tannins Filter Method % Min* Insoluble % Max Moisture % Max Lovibond Colour Red/Yellow >Ph Ash % Máx CROWN Block 64 ± 2 - 20.50 2,7-3,6 / 6,0-8,0 4,6-5,2 6.00 Solid Semi Solubles Tannins Filter Method % Min* Insoluble % Max Moisture % Max Lovibond Colour Red/Yellow >Ph Ash % Máx SUPERIOR Block 63± 2 11.50 20.50 3,2-5,0 / 7,9-12 4,2-5,1 2.0 UNIQUE CHD 70 ± 2 3.00 9.00 1,8-2,9 / 4,0-6,0 4,0-4,7 7.5