QTR-Quadtone RIP

Roy,

Thanks for this explanation : I never bothered to think about the 
gray color setting in PS which is a mistake.

I'll take an other chance to properly set my workflow.

Apparently "grey : dot 15%" is equivalent to a 1,51 gamma. The 
stepwedge is no tagged, but at creation time it had to have a working 
space, am I correct assuming it had a grey 1.8 gamma ? This is just 
for informative purpose : I would just like to measure the actual 
output of the stepwedge once QTR-ICC-profiled by applying a proper 
working space for conversion (I guess it is useless for actual 
editing-printing).

Working under Windows and in RVB color space for BW transformation 
(though ultimately PS grey mode is used for space saving sake) when 
editing and both being gamma 2.2, I plan to now set grey at gamma 
2.2 : minimum conversion should now take place. Does this make sense ?

Last, I haven't followed you at all on BPC : 
1. before converting to QTR-ICC profile and when soft-profing I 
go "personalised" and check perceptual/BPC/white paper simul. which 
also turns on black. What you mean is that black is not simulated ? 
2. the correct procedure would be (also before converting to QTR ICC 
profile) soft-proofing->personalised-> QTR-ICC name and check 
perceptual then no BPC and white paper (+ de facto Black) ?
Do you suggest any alternative soft-proofing procedure ?

Thanks for your help.

Olivier