Printing a gradient black to white on Roland Soljet Pro4 XR640

Just a quick hi to start with as im new on here

Im currently trying to print a Subaru graphic for a customer which has a gradiant from black to white and were struggling to get versaworks/xr640 to print it correctly It doesnt recognise the white as white as it needs to be set to the roland white. Im not great on AI yet but learning. I know the gradient isnt a vector when created so i assume this is somthing to do with it.

We are printing the full graphic white then another pass of white and colour then another pass of colour to achieve the desired results but behind the gradient it doesnt print white in full just behind the black of the gradient then prints the actual roland white as brown in it also. Ive added a picture to try and show what i mean. We are printing on clear metamark vinyl

We want to print the whole graphics solid white then the gradient colour over the solid white so it shows white rather than transparent in the gradient

I have an idea of copying each gradient layer removign the halftone and settign them as the roland white (Brown) then setting that layer belwo the gradient layer but not sure on flattening etc and what is required.

Any advice is welcomed

Thanks in advance

 

We’re replicating the oem graphics which has a clear surround around the whole thing.

its 100% has to match oem.