Graeme Bulcraig wrote:
> Has anyone actually come up with any standard guidlines on luminance settings? ISO did: Luminance between, 80-120 cdm2 (there are two relevant viewing standards depending on whether you're in Photography or graphical arts. ISO 3664:2000 says 75-100 from memory and ISO 12646:2004 (which is probably the most relevant one) says 80-120 & D50 as a must (Which btw. Requires that you have NO daylight anywhere in view and very low ambient light. Most people calibrate LCD's closer to 120-150 depending on the workarea. It really depends on whether it's a standalone machine or one used next to a light booth where you expect a good match. As the lightbooth should be 1500-2500 lux you'll need more intensity if you want a match. If anyone really wants to know go to ISO's website and purchase the standard. There's a link to the relevant part (graphical arts standards) at www.pixl.dk. > . We are also about to shift over to GMG >> COLOUR PROOF software next week, proofing files to ISO COATED and/ or >> DP10 standards. > gmg, eh? > I got trained on that a few months back by gmg. > nice kit, shame about it not running on Mac. > > Yes, Should be in next week...Running off Dual Xeon PC (arggh..PC), anyway. we > are really looking forward to seeing this 4-d colour transformation in action. > The non-ICC conversion may be a whole topic of discussion in itself...but as a > quicky.... > I was initially very concerned that the separations made in GMG might prove > problematic when opened back up in Photoshop. On opening the file (with no ICC > embedded profile), how does anyone actually VIEW this beautiful seperation? You assign the profile in question. > Obviously PS needs to assign (USE) a profile (even when you do not assign) to > show the info on screen. Will this be inaccurate to view? According to (pretty > grumpy) staff at GMG stand last week; Hope it wasn't Darrian - he's usually a nice bloke. > If we proof to ISO Coated in GMG and > then assign ISOCoated.icc in PS afterwards all will be fine and well. Yup. > I wonder > if you can clarify this? How does a non-ICC application, link back into an icc > app, or is it that only the CONVERSION is non-icc, meaning that afterwards we > are fine to go back to icc? Once converted you use the other side of the profile AtoB direction to convetr from cmyk to Lab. It should work fine, just as a CMYK file can be softproofed nicely even though it's been adjusted (think CMYK curves or selective colour). As long as the cobversion doesn't violate thg gamut of the device in question softproofing is not a problem (provided your monitor gamut is big enough of course). Best Regards, Thomas Holm / Pixl Aps - Photographer, Educator, Colour Management Consultant & Seminar speaker - Remote Profiling Service (Output ICC profiles) - www.pixl.dk � Email: th[AT]pixl.dk -- =============================================================== GO TO http://www.prodig.org for ~ GUIDELINES ~ un/SUBSCRIBING ~ ITEMS for SALE
