Update file week04.md

docs/assignments/week04.md

 # 04 **BIOCHROMES**
 
-## Research
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+ **Scouring Cellulose Fabics**
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+1. Put linen into a large pot of water.
+2. Add 5.7g(10%) of soda for 57g of linen
+3. Simmer for approximately 1hr to fully remove any wax, pectic substances, and oil. (The resulting water may look yellow brown)
+4. Allow fibre to cool down slowly and then rinse in hot water.
+
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+## **Bacteria Dye**
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+
 
 ![describe what you see in this image](../images/home/sample-image.jpg){ width=400 align=right }