T04

Colour, Dyeing and Finishing

Colour, Dyeing and Finishing: 5 courses and 25 lessons on ATMA. Every lesson is free to read, with an Excel template for each course.

T04-C01 Fabric Preparation

1. Why greige fabric needs preparation before dyeing
2. Desizing, scouring and bleaching: what each preparation step removes
3. Checking a fabric is ready for dyeing before it leaves preparation
4. Common preparation faults and what causes them
5. Building a fabric-preparation readiness checklist

T04-C02 Dyeing Systems and Dye Classes

1. How dyeing works: fibre, dye and fixation
2. Dye classes and which fibres each one dyes: reactive, disperse, acid and vat
3. Batch dyeing vs continuous dyeing: how a mill chooses between them
4. Dye-lot minimums and how they affect a small order
5. Choosing a dye class and dyeing method for a given fibre and order size

T04-C03 Colour Management and Approval

1. How a colour standard is set and communicated to a mill
2. Lab dips and strike-offs: approving a colour before bulk dyeing
3. Reading a colour approval report: pass, fail and conditional approval
4. Shade variation and metamerism: why a colour can look different under different light
5. Tracking colour approvals across a bulk order

T04-C04 Printing

1. The main printing methods: screen print and digital print
2. How many print colours or screens a design needs and why it affects cost
3. Calculating print cost from method, colours and quantity
4. Print placement and common print faults
5. Choosing a print method for a given design and order size

T04-C05 Finishing and Garment Washing

1. Common fabric finishes and what each one does
2. Common garment washes: stone wash, enzyme wash and standard wash
3. How washing changes a garment's size, colour and hand-feel
4. Checking a washed garment against the approved wash standard
5. Building a finishing and wash-approval checklist for an order

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