HP Latex - Gray is Purple

Hello all. First time poster here. I also have a lot to learn in the print world so bare with me. I have an HP Latex 110 and I use Flexi to rip & print. We often have an issue where a simple gray (IE - 30% black) comes out looking purple. Do I simply need to use a "rich gray"? Or maybe I need to reduce the optimizer level or perhaps there is a print setting I can check or uncheck? Please advise.

The first thing that should be checked is the nozzle performance of the printer. Pay particular attention to printhead number 2, which delivers light cyan and light magenta inks on the Latex 110 printer. The nozzle test print is located under the Image Quality Maintenance Menu > Clean Printheads > Test Print. If you are missing blocks of nozzles, run one or more cleanings to attempt to recover the missing nozzles. It is possible to disable Color Management in the SAI RIP software. When doing so, the raw CMYK values in the file are passed through to the printer without modification in the RIP. See attached screen grab for where this is done in the SAI RIP.

It required me replacing print heads to correct this issue. My printer is the 560, however.

I have a 315 and the color shift happened to me. Also, my greys started to print pink. I changed out printheads and replaced all my ink (it was expired). Nothing helped. Any suggestions would be great!

#5 We are having the same issue. Did you ever find a solution?

#6 Yes. I ended up changing the LM/LC printhead. No more issues.

I've had almost one year fight with Grey colour on our 330 and based on my experience there are two solutions. First and most important - Convert all your files to RGB in PhotoShop. Not in Flexi for example. All CMYK Greys are purplish. Rarely you may need to replace the printheads but not all. Mostly the LC and LM. Once my files were converted to RGB, the grey-purple issue just disappeared and grey is grey as have to be. Hope this helps.