Whether you're going for a hippie-chic look, getting crafty with your clothes or helping a child create her own 1960s-inspired style, tie-dyeing is a relatively easy way to add some pizazz to your plain white T-shirts or sweatpants. Unless you're aiming for a faded or pastel look, you'll want your tie-dye colors to stay as bold and bright as they look when you mix them up. Before you rinse away all your hard work and let your tie-dye masterpiece fade, take the time to ensure that your colors stay bright.
Select the right fabric for your project as a criteria for keeping your colors bright. Opt for 100 percent cotton, wool, linen or rayon pieces, which will accept and hold the dye better than polyester or acrylics.
Presoak your fabric in a sodium carbonate, or soda ash, bath to prep the material to better accept the dye.
Use the appropriate amount of dye for the weight and dimensions of your tie-dye project. Mix up a batch of dye using more powder or liquid color for larger pieces such as sheets, blankets or oversized shirts; double the amount of the dye to create an ultra-bright hue.
Keep your garment in the dye bath for a longer time than what's on the dye label instructions. Let your garment soak for up to one hour to fully saturate it with color and create a brighter shade.
Wash your tie-dyed clothes with a mild detergent only. Choose a gentle laundry soap that doesn't contain harsh chemicals or bleach.