It needs many complete chemical and mechanical treatment from raw hides to finished leather, generally need pass 30-50 working procedure. Usually divided into four stages : preparation for tanning, tanning process, wet process after tanning and drying & finishing process .
A. Cattle Shoe Upper Leather Production Process
Raw Hides: Salted Cow Hides
1. Preparation For Tanning
Grouping → Weighing → Pre-Soaking → Fleshing → Main-Soaking → Weighing → Liming →Fleshing → Split Neck
2. Tanning Process
Weighing → Washing → Deliming → Softening → Pickling → Chrome Tanning → Stacking
3. Wet Process After Tanning
Selecting & Grouping → Sammying → Splitting → Shaving → Trimming → Weighing → Washing → Chrome Re-Tanning → Neutralizing → Re-Tanning → Dyeing & Fat Liquoring → Washing → Stacking
4. Drying & Finishing Process
Setting Out → Vacuum Drying → Stewing → Hang Drying → Wetting Back → Staking → Milling → Toggling Drying → Trimming → Selecting
(1) Full-Grain Shoe Upper Leather: Cleaning → Coating → Ironing → Classifying → Measuring → Storage
(2) Corrected Upper Leather: Buffing → Dedusting → Dry Filling → Hang Drying → Staking → Selecting → Buffing → Dedusting → Ironing → Coating → Embossing → Ironing → Classifying → Measuring → Storage
B. Goat Garment Leather
Raw Hides: Goat Skin
1. Preparation For Tanning
Grouping → Weighing → Pre-Soaking → Fleshing → Main-Soaking → Fleshing → Stacking → Painting With Lime → Stewing → Liming → Washing-Fleshing → Cleaning → Split Neck → Washing → Reliming → Washing
2. Tanning Process
Weighing → Washing → Deliming → Softening → Pickling → Chrome Tanning → Stacking
3. Wet Process After Tanning
Selecting & Grouping → Sammying → Shaving → Trimming → Weighing → Washing → Chrome Re-Tanning → Washing-Neutralizing → Re-Tanning → Dyeing & Fat Liquoring → Washing → Stacking
4. Drying & Finishing Process
Setting Out → Hang Drying → Wetting Back → Staking → Milling → Toggling Drying → Trimming → Cleaning → Coating → Ironing → Classifying → Measuring → Storage
