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WHAT IS TANNING? ” SYNOPSIS What is Tanning? ” 1. History of formation 2. What is the pre-tanning stage? 3. Implementation process 3.a Soaking 3.b Liming 3.c Unhairing and scudding 3.d Deliming and bating 3.e Pickling 4. What is the process of tanning? 4.a Chrome Tanning 4.b Vegetable Tanning 4.c Alternative Chemicals 4.d Natural Tanning 4.e Tawing 4.f Traditional tanning of Vietnamese people 5. Health and environmental effects 6. Alternatives 7. Linking together 8. Final summary (What is tanning) 9. Some additional information 9.a How many types of