With a plant mister, spray a fairly even coat of the liquid over the entire sheet. Let it dry for a while, then place the paper between blotter sheets and weigh it down. The paper can still be a little damp for the following coats. Splatter, blob, drip on brown ink, sprinkle on a little dry tea or coffee. Gouache is another choice in this situation.
Gouache mixed with acrylic matte medium makes a non-bleeding , flexible color.
Clean tools immediately after using. Use sandarac for papers on which ink sinks in, spreads, or bleeds. As nib size gets smaller, thin the gouache more. Use artist grade gouache if you can afford it. Student grade has less pigment and more binder in it.