Akua modifiers allow the artist to experiment with different levels of transparency, viscosity and workability. Tack Thickener thickens Akua Kolor for heavier roll-up applications. It can be used for creating denser Akua Kolor roll-ups onto monotype plates or woodblocks. It is not as thick as Transparent Base or Akua Intaglio Ink. It is amber in colour with a consistency similar to molasses. Tack Thickener cleans up in soapy water.