Basic Level Dyehouse Course
BASIC LEVEL DYEHOUSE COURSE
LEARNING OBJECTIVES
Lecture 1 Overview of the Leather Industry
The relationship between the meat industry and the tanning industry
The different processing options available to tanneries
The factors that impact on the global tanning industry
Lecture 2 Beamhouse and Tanyard Operations
The different parts of the animal skin
What the beamhouse is in a tannery
The different process steps that take place in the beamhouse and the order in which they occur
The changes that take place to the raw material in the beamhouse
What the tanyard is in a tannery
The different process steps that take place in the tanyard and the order in which they occur
The changes that take place to the raw material in the tanyard
The difference between wet blue and wet white
Lecture 3 Splitting to Neutralization
The reason why hides are split and shaved
The reason why skins are only shaved and not split
The importance of the wetting back process
The reason why wet blue must be wet back properly
The effect of rechroming on wet blue
The importance of neutralisation prior to the main dyehouse processes
Lecture 4 Retanning
Why leather is retanned
The different types of retanning chemicals
The properties that these different retanning chemicals give to the leather
Lecture 5 Dyeing
Why leather is dyed
Different types of dyestuffs
Practical methods of dyeing
Lecture 6 Fatliquoring
Why leather is fatliquored
Some of the properties that fatliquors give to leather
What would happen if leather was not fatliquored
The different types of fatliquoring chemicals
How fatliquoring is done practically in the tannery
Lecture 7 Fixation
Why fixation is carried out at the end of the dyehouse processes
What would happen if fixation is not carried out
The importance of the final wash in the dyehouse
The different possible processing options in the dyehouse
Lecture 8 Setting, Drying and Milling
Why leathers are set out
How leathers are dried
Why leathers are conditioned
Why leathers are milled
Why leathers are staked
Lecture 9 Crust Leather Testing
The different tests carried out on crust leather
The equipment used to carry out tests
The reason why the different tests are carried out
Lecture 10 Post Dyehouse Operations
Why leathers are buffed
Why leathers are finished
The mechanical processes after finishing
The measuring of leather