If you have installed the inks in the correct positions according to the curves - and there are several versions of curves - and you are using Pictorico OHP or OHP Ultra film - and using QTR to OUR directions rather than the QTR download manual instructions - the ink output will be smooth and linear. There is nothing you can do to adjust that.
This smooth film output is then put into your alternative process and the medium can be linearized through use of a PhotoShop curve.
For silver print, platinum print, carbon print and other alt proc which require similar UV or density blocking, methodology 3 curves are used and five different density curves are available. The final linearization if required is done with simple Photoshop curve.
If your film output is NOT SMOOTH and linear - then something is wrong in your process. Let us know.