Solution #5UV is the recovery fluid for UV curable print heads: Spectra, Xaar, Konica-Minolta, Hitachi, Toshiba Tec, etc. Our strongest UV solution, which can dissolve a completely cured UV ink. WARNING! Use this solution only on a Print Head Doctor with the Swiss-made pumps. It’s too harsh for the standard pumps and it will damage them in just a few minutes of operation. Do not leave this solution inside a print head for more than 30 minutes. Flush the head out using the Intermediate Fluid or, if applicable, with the flushing solution that came with the inks that were used on that print head. Note: Fluid 5UV is identical to 9UV in the performance characteristics. We make both 5UV and 9UV depending on the availability of the raw materials. If you ordered 9UV you may receive 5UV.