15LT21T: Basics of Leather Leather Tech 2nd Sem Syllabus for Diploma DTE Karnataka C15 Scheme

Basics of Leather detail DTE Kar Diploma syllabus for Leather And Fashion Technology (LT), C15 scheme is extracted from DTE Karnataka official website and presented for diploma students. The course code (15LT21T), and for exam duration, Teaching Hr/week, Practical Hr/week, Total Marks, internal marks, theory marks, duration and credits do visit complete sem subjects post given below. The syllabus PDFs can be downloaded from official website.

For all other leather tech 2nd sem syllabus for diploma c15 scheme dte karnataka you can visit Leather Tech 2nd Sem Syllabus for Diploma C15 Scheme DTE Karnataka Subjects. The detail syllabus for basics of leather is as follows.

Pre-requisites:

Fundamentals of Basic Sciences of Secondary Standards.

Course Objectives:

1. To understand the various kinds of Hides/Skins.
2. To understand the specific Grain characteristics, temporary preservation methods.
3. To understand the permanent preservations of Hides/Skins with the basics of Chrome & Vegetable tanning methods with their principles.
4. The subject is prerequisites for understanding of various operations in leather processing.

Course Outcomes:

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UNIT-I ANATOMICAL STRUCTURE OF HIDES AND SKINS.

Structure of Hides and skins & Characteristics – Grain pattern of different Hides and skins -Portion of skin required for making Leather – Chemical constituents of Raw Hides and skins -Fats and proteins – Proteins – properties and classification sequence – Amino acids -Definition , preparation , properties and classification – Polypeptides -peptide formation of amino acids -Degradation of proteins – Collagen, keratin &Reticulin- properties.

UNIT – II PRESERVATION OF HIDES AND SKINS.

Flaying Techniques – Study of livestock population in India – Putrefaction Mechanism – Curing -Theory – Effect of Bacteria and Mould growth on Rawhides and skins – Wet Salting, brining,Dry salting – Salt less preservation techniques – Defects of hides and skins – Ante mortem and post mortem-Classification and grading of hides and skins.

UNIT-III TANNERY OPERATIONS.

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UNIT- IV CHEMISTRY OF PRE-TANNING PROCESS.

Soaking – Objectives and chemicals used – Wetting agents- theory – Effect of temperature , pH -Enzymatic soaking – Liming – Objectives and chemicals used – Various methods of liming -Bacterial action on lime liquor – Chemistry operations – Lime yard operation – Deliming -Objectives – Chemicals used – Chemistry of Deliming – Drenching -Chemistry – Difference between Deliming and Drenching – Completion of Deliming – Bating – Objectives – Important factors of bating – Proteolytic enzymes – Pickling – Objective – Depickling – Objective -Degreasing – Objective – Methods of degreasing.

UNIT- V CHROME TANNING

Introduction to Cr Tanning – Basicity – Chemistry of chrome salts – Werner’s theory of coordination complex of Cr compounds – Anionic, cationic, neutral Cr complex – Olation, oxalation, polymerization – Golden rules of chrome tanning – Single and double bath process of chrome tanning – Self basified Cr liquor – Chemical controls in tanning – Masking – Definition -Theories of Cr. tanning.

UNIT- VI VEGETABLE TANNING

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Reference Books:

1. Theory and practice of Leather manufacture -K.T. Sarkar.
2. Principles of leather manufacture -S.S.Dutta.
3. Leather Technicians Hand Book – J.H.Sharphouse

SUGGESTED LIST OF STUDENT ACTIVITIES

Note: the following activities or similar activities for assessing CIE (IA) for 5 marks (Any one)

1. Each student should do any one of the following type activity or any other similar activity related to the course and before conduction, get it approved from concerned Teacher and HOD.

2. Each student should conduct different activity and no repeating should occur

1. Collect various types of leather having distinct properties.
2. Compare the various curing operations and prepare a report
3. Compare the various tanning processes with their effect on environment and prepare a report

Course Delivery:

• The course will be delivered through lectures and Power point presentations/ Video.

MODEL QUESTION PAPER (CIE)

1. Draw & explain the anatomical structure of hides and skins.
2. Describe amino acids& find out its general formula.
3. Define putrefaction. Explain the mechanism of putrefaction. OR

Analyze the effect of bacteria & mould growth on raw hides and skins.

4. Explain the degradation of Protein. OR Determine the portion of skins required for making leather.

MODEL QUESTION PAPER (SEE)

NOTE:

1. Answer any 6 questions from section A & 7 full questions from section B.
2. Each question carries 5 marks in section A.
3. Each question carries 10 marks in section B.

SECTION – A

1. Draw & name the anatomical structure of hides and skins.
2. Discuss the present livestock population in India.
3. Define putrefaction. Examine the reason of putrefaction.
4. Explain the importance of post tanning operations.
5. Recall soaking operation with its objectives.
6. Explain the effect of wetting agents on soaking.
7. Describe the deliming operation with its objectives.
8. Explain basicity in terms of chrome tanning.
9. Write a note on Barkometer.

SECTION – B

1. Describe the general properties of protein. (6)
2. Determine the portion of skins required for making leather. (4)
1. Describe the various salt-less curing techniques. (6)
2. Explain the mechanism of putrefaction. (4)
1. Do the classification & grading of hides/ skins. (5)
2. Discover the effect of bacteria and mould growth on raw hides and skins. (5)
1. Define & classify the hardness of water. (5)
2. Explain the effects of hard water on tanning. (5)
1. Classify the various tannery unit operations & explain. (5)
2. Show the sequential operations of chrome tanning. (5)
1. Explain the enzymatic unhairing process. (5)
2. Discuss the chemistry of deliming operation. (5)
1. Explain the important factors on which bating depends on. (6)
2. Explain degreasing operation. (4)
1. Compute the effect of bacterial action on lime liquor. (5)
2. Distinguish between deliming & drenching operation. (5)
1. Find the empirical formula of 50 % basic chrome sulphate complex. (5)
2. Describe the golden rules of chrometanning. (5)
1. List out the factors determining astringency of veg. tannins. (6)
2. Write a note on penetration of vegetable tannins to pelts. (4)

For detail syllabus of all other subjects of BE Leather Tech, C15 scheme do visit Leather Tech 2nd Sem syllabus for C15 scheme.

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