Thomas Holm / Pixl wrote : >And you do simulate paper white/ink Black?
Yes, if I am using the monitor to match views. Thomas Holm / Pixl wrote : >Remember a working space can have a contrast range >between >Lab 0 and lab 100. Few output processes can >get beyond L >6-7 in the shadows and L93-94. This makes perfect sense given the fact that the GS 23 patch of the IT8 target is never below L*5. So how do we explain the fact that most ICC profiles ( including high quality professionally made profiles that do handle BPC effectively ) map data to L*2, L*3 and L* 4?. This is one of the reasons that I am suspicious of the CM system and its instrument's ability to accurately measure and process luminosity values in this range. For example the blackest printer I have ever encountered is an old desk top dye ink Photo Stylus 700. Its black measures at 2.7 reflectance density and the manufacturer's profile maps L*0 to L*7 with BPC. And yet a Stylus 7500 ( pigmented inks) using a custom made profile that maps L*0 to L*3 produces a black of only 2.1 reflectance density . I have never been able to establish a consistent relationship between L* and density for a number of different printers, when in fact there is even a mathematical formula to do so, (which I have actually seen it but which appeared to me to be written in Aramaic) At one point, out of curiosity, I tested my own printer by shutting down colour management and sending raw data directly to the printer with no interference of any kind along the way, just to note the control signals responsible for specific densities. Once I learned how to talk the language of my printer I turned the colour management back on and used these numbers to know in advance, after all linearisation adjustments, data compression and endpoint compensation, precisely what densities were going to print out. Obviously you cant do this for every printer, but it taught me a lesson. If you follow the L* values everything looks fine, but if you interpret the output control signals you will realise that some of those L* values are being assigned electronic control signals that are beneath the maximum black output of the device. Thomas Holm / Pixl wrote : >Set this to view > Softproof > Monito r RGB. Yes, I read about this method in Fraser/Murphy Colour Management. My monitor does distinguishes L*0 from L*1 and yet I have never seen that line printed with any combination of printer-ink-paper. Can you tell me why the out of gamut warning doesn't function with luminosity values that are out of the dynamic range of the device? Thanks again for your kind assistance >>Paul Lowry >>Academy of Lagado >>Lower Laurentians,Canada >>www.paullowry.com >>[EMAIL PROTECTED] =============================================================== GO TO http://www.prodig.org for ~ GUIDELINES ~ un/SUBSCRIBING ~ ITEMS for SALE
