Testing and evaluating textile performance in HSC Textiles and Design Properties and Performance of Textiles
“The testing and evaluation of textile properties and performance, including strength, abrasion, colourfastness, shrinkage, flammability and care testing, and how test results are used to judge a fabric against the requirements of its end use”
Textile testing measures properties objectively so a fabric can be judged against the demands of its end use. Common tests cover strength and tearing, abrasion and pilling, colourfastness to washing and light, dimensional stability and shrinkage, flammability, absorbency and care behaviour. Results are compared with the requirements of the end use: a pass justifies the fabric, a fail sends the designer back to choose or treat a different fabric.
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What this dot point is asking
You need to explain how textile properties are tested and how the results are used to decide whether a fabric suits an end use. NESA wants you to know the main tests, what each measures, and the reasoning that turns a test result into a design decision. This dot point makes the structure to property to performance chain measurable: testing produces the evidence that justifies a fabric choice, both in the exam and in the experimentation of the Major Textiles Project.
Why testing matters
Testing replaces guesswork with evidence. A fabric may look right but fail in use if it shrinks, fades, pills or burns too readily. Standardised tests let a designer or manufacturer measure a property under controlled conditions and compare it with the performance the end use demands or with a standard the product must meet. In the design process, testing belongs to devising and evaluating: trialling samples to confirm a fabric performs before committing to it, and checking the finished item against criteria. Honest testing prevents items that look good on paper but fail their user.
Strength, abrasion and durability tests
Durability tests measure how a fabric withstands force and wear. Tensile or breaking strength tests pull a fabric until it breaks, while tear tests measure resistance to tearing once a cut starts; both matter for items under load such as bags, workwear and upholstery. Abrasion tests rub a fabric against a surface to count how many cycles it survives, predicting how it will wear at seats, cuffs and elbows. Pilling tests tumble or rub a fabric to see how readily loose fibres ball on the surface, which affects appearance and is common in low twist knits.
Colourfastness and appearance tests
Colourfastness tests check whether colour stays put. Fastness to washing confirms a fabric will not bleed or fade in laundering, fastness to light confirms it will not fade in sunlight (vital for curtains and outdoor items), and fastness to rubbing or crocking checks colour does not transfer onto skin or other fabrics. Results are usually graded against a standard scale. A fabric with poor light fastness might be fine for a lining but unsuitable for a sun exposed furnishing, which shows how the same result leads to different decisions depending on end use.
Dimensional, care and safety tests
Other tests cover stability, care and safety. Shrinkage and dimensional stability tests wash or relax a fabric to measure how much it changes size, important for fit and for furnishings. Care testing confirms how a fabric behaves through washing, drying and ironing, informing the care label. Flammability testing measures how readily a fabric ignites and how fast it burns, which is critical and regulated for children's sleepwear and furnishings. Absorbency and water resistance tests measure moisture behaviour for activewear, towels and outerwear. Each test targets a property that a specific end use makes essential.
Using results to judge a fabric
A test result only has meaning against a requirement. The reasoning runs: identify what the end use demands, set a target or standard, test the fabric, then judge it. Upholstery demands high abrasion resistance and good light fastness, so a fabric is judged against those; activewear demands moisture wicking, stretch recovery and colourfastness to sweat. If a fabric fails, the designer responds: choose a stronger fibre or construction, add a finish, or change the end use. This is exactly the justified, evidence based decision making that the project documentation should record.
Bringing it together
In the exam, link a named test to the property it measures and to the end use that makes it matter, then explain how the result would guide a decision. In your project, test samples during devising and record the results so your fabric choice is justified by evidence rather than assertion. Testing is where the abstract properties of fibres, construction and finishes become measurable, comparable and defensible.
You are choosing a fabric for a heavy-duty backpack and have two samples. Use testing to make an evidence-based decision.
Step 1: Set the requirements from the end use
A backpack must carry load (high breaking and tear strength), survive rubbing against the body and surfaces (high abrasion resistance), resist fading outdoors (good light fastness), and shed light rain (water resistance).
Step 2: Test both samples under the same conditions
Run tensile, tear and abrasion tests, a light-fastness test and a water-resistance test on identical specimens of each fabric so the comparison is fair and the results are reliable.
Step 3: Compare results against the targets
Sample A survives more abrasion cycles and a higher breaking force than Sample B and grades higher for light fastness; Sample B fades and tears at a lower load.
Step 4: Make and justify the decision
Select Sample A because its test results meet the load, wear and fading demands of the backpack. If it failed water resistance, you would add a durable water-repellent finish rather than reject it outright. Record the results as justification.
Testing measures a property objectively so a fabric can be judged against the demands of its end use. Match the test to the requirement: abrasion and tensile tests for durable items, colourfastness to light for sun exposed furnishings, flammability for sleepwear, shrinkage for fit. A result only matters when compared with what the end use requires.
Do not list tests in isolation or describe them as laboratory procedures with no purpose. The marks come from linking each test to the property it measures and to the end use that makes it essential, then explaining how a pass or fail would change a design decision. A result without a requirement to judge it against is meaningless.
Exam-style questions
Questions in the style of NESA exam questions on this dot point, each with a worked answer. They are written by ExamExplained unless tagged "Past paper"; the year shows the paper a question is modelled on.
HSC 2022-style3 marksOutline how colourfastness and abrasion testing would be used to judge a fabric for outdoor furnishing.Show worked answer →
Three marks: name what each test measures and link the result to the outdoor furnishing end use.
Colourfastness to light: exposes the fabric to light and grades how much the colour fades. Outdoor furnishings are exposed to sunlight, so a high light-fastness grade is needed or the fabric will fade quickly.
Abrasion testing: rubs the fabric for many cycles to measure wear resistance. Furnishings are sat on and handled, so high abrasion resistance is needed for durability.
Judging: compare each result with the demands of outdoor use; a fabric that fades or wears quickly fails and a more suitable fabric or finish is chosen.
Full marks link both tests to the end use. Describing tests without the furnishing link sits lower.
HSC 2023-style5 marksExplain how textile testing is used during the design process to justify the selection of a fabric for a named textile item.Show worked answer →
Five marks: explain the testing-to-decision chain for a real item, with examples.
Name an item, for example children's pyjamas.
Set the requirements from the end use: low flammability (a safety standard), softness and absorbency for comfort, dimensional stability so they keep their fit, and colourfastness to washing.
Test samples during devising: a flammability test against the regulated standard, a shrinkage test through laundering, and a wash colourfastness test.
Use the results to justify or reject: a fabric that passes flammability and shrinkage is justified; one that fails flammability is rejected outright on safety grounds.
Top band explains the chain from requirement to test to decision with examples. Listing tests without the justification link sits lower.