Earlier this month I did a little online research on pre-washing silk (see “Prewashing Silk Fabric“) because I was trying to figure out how I should treat this fabric before sewing it: dry clean, pre-wash by hand or machine, what soap or detergent to use, etc. I decided to limit my tests to hand washing because the fabric is rather delicate and I think a washing machine would be too rough. Here are results of my tests for pre-washing silk chiffon.
I did three tests using 4-inch (10 cm) squares of fabric, hand washing each piece in my bathroom sink using 1/4 teaspoon (~4 ml) of Johnson’s baby shampoo. I picked that amount because I guessimate that you use about a teaspoon or tablespoon to wash your hair. (Note: It takes about 1.5 gallons (5 liters) of water to get my sink 2/3 full.)
Here are the three tests I did:
- Wash and rinse in cold water and the iron on silk setting
- Wash and rinse in lukewarm water (barely warm) and iron on silk setting
- Wash in lukewarm water and rinse with water mixed with 1/8 cup (30 ml) of vinegar. I just picked that amount because it was half the amount Steph mentioned in her post about washing silk in the washing machine (see “This Is how I Care For Silk“). I also ironed this square on the silk setting.
And here’s my documentation of the process:
My third test (washing in lukewarm water and rinse in vinegar solution) was with this square of chiffon.
The hand of this silk chiffon is very soft and has a lovely drape as you can see in the photo below (see “The Hand of Fabric” for more on the hand of fabric). So I really didn’t want to change the hand significantly by washing it. Note: I held each square in the center, with the front edge parallel tome. I didn’t want to hold it on the bias, which would make each square more “drapey” than usual.
So what will I do? I’m leaning heavily toward prewashing in lukewarm water and rinsing in lukewarm with a little vinegar. Though this version shrank the most, the hand changed the least – and the hand is more important to me than a little shrinkage.
I envision this silk chiffon floating over a lightweight cream wool skirt. My next step is finding or modifying the right pattern or drafting my own skirt pattern.