If it is a traditional Chinese painting pigment, use a special glue for traditional Chinese painting and yellow translucent crystals, which are generally available in traditional Chinese painting shops. Put it in warm water and heat it in water, that is, a container with glue, put another container outside, add water to the outer container and heat it.
When all the glue in it melts, there will be no particles when you touch it with your hands. Mix the pigment and glue and you can use it.
But I don't know what kind of pigment you are, so you have to try the ratio of glue to water first. You can start with 1: 3. If it is too thick, it can be adjusted with warm water.