Solution #4W is designed to effectively recover water-based print heads, including Epson, Brother GT3, and GTX printers. 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 afterward.