To dye silk: start with a large bucket or glass pot or enameled vessel. A cheap plastic bucket is best because the black will stain everything. Don’t use the washing machine for dyeing, no matter what the dye package says. Use any supermarket dye and follow the package directions and add a quarter cup of vinegar to the dye-water. Be sure there’s enough dye solution for the item to freely swim about in the dye. It shouldn’t be bunched up. Pre-wet the item before placing it in the dye. Wetting allows the dye to permeate the item. Leave it in the dye twice as long as the package states. When the time is up remove it and rinse it well until there is no more excess dye coming out. Squeeze the excess water out of the item and let it dry. If it’s wrinkled then press the item on the inside using a warm iron, place a cloth between the iron’s surface and the silk to prevent scorching. When finished you should have a reasonably black top. Here’s the RIT dye site, they have lots of tips and tricks for dyeing. Be sure to add vinegar to the dyewater, silk needs the extra boost.
http://www.ritdye.com/Home.1.lasso
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I do lots of dyeing.