Concentrated water based pigments must be used in combination with an extender. The ratio of extender to pigment determines the shade and depth of color.
From the product label:
AquaBrite® Extender is a ready to use medium for the mixing of concentrated water-based textile pigments.
Appropriate mixing ratios of concentrated pigment to extender are between 5%-10%. AquaBrite® Extender may also be mixed into ready to use textile inks to reduce opacity, thereby increasing transparency. They should be heat set at 300 degrees Fahrenheit. You may let the printed garments dry at room temperature and then iron from the reverse side, or use a tumble dryer at the highest heat setting. Screens made with Holden’s Emulsion 250 are recommended.