The term Reducer is used to describe a fast drying thinner:

(In order from fastest drying to slowest)

100-VR-1291 - Spray thinner for all Ruco inks

35353 - Fast Drying Reducer

38571 - Fast Drying Reducer

100-VR-1370 - Fast Drying Reducer (for T25 Series only)

35696 - Fast Drying Reducer (for Glass inks only)

38279 - Medium/Fast Drying Reducer

38472 - Medium Drying Reducer