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Burn test to determine if a fabric is 100% cotton or cotton/polyester 

Melissa Klaassen Sews
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Burn tests for cotton and cotton-polyester fabric
How do you know if a fabric is all cotton-the the preferred fabric to make masks right now? My favorite way is to do a burn test. I did a quick video and even fooled myself by grabbing the wrong fabric swatch and discovered it had polyester. This activity is fun and one I did a lot in college as a grad assistant for the textiles program and with my own high school students.
Cotton is a cellulose fiber. It burns and may flare up when lit. No melted bead is left by it. After burning, it continues to glow. It gives out a smell like that of a burning paper. The smoke is gray or white. The ash is fine and soft and can be easily crumbled.
Polyester Is a polymer produced from coal, air, water, and petroleum products. It burns quickly and shrinks away from flame, may also flare-up. It leaves hard, dark, and round beads. After the flame, it burns slowly and is not always self-extinguishing. It has a slightly sweet chemical odor. It leaves no ash but its black smoke and fume are hazardous.
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14 авг 2024

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Комментарии : 11   
@natogaia3502
@natogaia3502 2 года назад
This is the only video I could find that tested cotton/poly blend. I immediately knew the first fabric had polyester in it because the smoke was black near the end; cotton has a clean burn. Great vid, thank you!
@melissaklaassen9200
@melissaklaassen9200 Год назад
Great insight.
@riahj8967
@riahj8967 2 года назад
Thank you. This was very helpful. I'm here for a school assignment.
@melissaklaassen9200
@melissaklaassen9200 2 года назад
Thank you! I love studying textiles. Good luck with class.
@behnaza.p9676
@behnaza.p9676 Год назад
Thank you 😊 💓
@tjtommy5495
@tjtommy5495 2 года назад
Black Smoke/ Black Residue = Polyester No Black Smoke/ No Black Residue = 100% cotton
@melissaklaassen9200
@melissaklaassen9200 Год назад
Great observation. I agree!
@cecilehilts1003
@cecilehilts1003 2 месяца назад
Is there any way to find out what % of polyester is in the fabric, if it is not labelled?
@melissaklaassen9200
@melissaklaassen9200 4 года назад
You can also use a metal container or aluminum foil instead of a glass dish.
@joannaalston469
@joannaalston469 Год назад
what is the yellow residue left behind? i’m getting the same thing-oily yellow residue after burning my fabric. both the polyester blends and the cotton seem to have left it in your video.
@melissaklaassen9200
@melissaklaassen9200 Год назад
Good observation. I didn’t use a clean bowl after burning the blended fiber-so I think it’s most likely from the first burns- not from the 100% cotton burn.
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