Recovery Fluid # 4W for use with the Print Head Doctor, 1 liter bottle.
Solution #4W is designed for effective recovery of water-based print heads, including Epson. It is our strongest solution in the "W" line of fluids.
Warning: Do not use the RF caps with this fluid, as it will damage them. It's strong enough even to strip the anodizing off the aluminum surface. Limit your print head cleaning time with this solution to a maximum of 30 minutes, and flush it out afterwards.