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Basic Level Courses
BASIC LEVEL DYEHOUSE COURSE CURRICULUM
Unit 1 Overview of the Leather Industry
Role of leather industry in relation to farming, abattoirs and leather goods manufacture
Tannery processing options
Factors that impact on the global leather industry
Unit 2 Beamhouse / Tanyard Operations
Soaking
Unhairing / Liming
Fleshing
Deliming
Bating
Pickling
Tanning
Basification
Horsing up / Ageing
Sammying
Sorting / Grading
Unit 3 Splitting to Neutralization
Splitting
Split substances
Grain split
Flesh split
Shaving
Reasons for wetting back
Wetting back times
Reasons for rechroming
Rechroming times
Reasons for neutralization
Different neutralization pH's
Unit 4 Retanning
Reasons for retanning
Retanning chemicals
Unit 5 Dyeing
Why leathers are dyed
Types of dyestuffs
Top dyeing
Intermediate crusting
Crust leather
Powder vs liquid dyestuffs
Unit 6 Fatliquoring
Reasons for fatliquoring
Types of fatliquors
Pre-fatliquoring
Fatliquoring temperatures
Unit 7 Fixation
Reasons for fixation
pH vs charge on leather
Final wash
Unit 8 Setting, Drying and Milling
Setting
Hang drying
Toggle drying
Paste drying
Vacuum drying
Conditioning
Staking
Milling
Unit 9 Crust Leather Testing
Standard sampling position
Conditioning of samples
Tests carried out on crust leather
Unit 10 Post Dyehouse Operations
Buffing
Impregnation
Leather finishing
Measuring