Silk rose petals are often dyed to match a color theme for weddings or events where the setting is romantic. It is often possible to purchase bulk rose petals from online wedding supply stores. It is often a good idea to select lighter color rose petals so that you are not trying to dye over an already dark color.
Use the Rit dye custom color chart to determine the correct amount of dye for the custom color you want for your silk petals. This color chart is available online from Rit dye.
Use a 2- to 3-gallon stock pot filled with water. Place the stock pot on the stove with the heat on medium until the water is near a boil. Lower the heat to low.
Dissolve 1/4 cup of salt into the water. Stir with a painting stick or disposable large spoon. Put on rubber gloves and pour your Rit dye mixture directly into the water. For custom colors you may be mixing several colors to achieve the right color. Stir the dyes until they are well mixed.
Drop one or two silk petals into the pot and allow them to cook for 15 minutes. Remove a petal and rinse it under cool water until no more dye comes off. Dry the petal on a paper towel and see if the petal is the correct color. You may adjust your dye mixture several times before you have exactly the color you want. Keep in mind that the color will darken when you dye the petals for hours.
Dye 1,500 petals at a time. Allow yourself a time where you can be in the kitchen for six hours without leaving the area. Keep your pot on low and allow the petals to dye. Use the stir stick to mix the pot every hour or so. Remove, rinse and dry petal samples about every hour to see when you have exactly the color you want.
Place a metal colander in your sink and use a spoon with lots of holes to move petals from the stock pot to the colander. Run a cool stream of water over your colander. Remove all of your petals from your dye bath. Put your dye bath back on the stove on a cool burner and cover with its lid or foil. You can usually use the dye bath two to three times before you need to make a new batch. This will save you money if you have a lot of petals to dye.
Once petals rinse clear, separate the petals and lay them on cookie drying racks until they are dry. Store them in resealable bags out of direct sunlight so they don't fade.