Becky wrote: > 'm struggling to get good black and white prints from my epson 2100. I have > a profile for my printer with the paper I'm using (Epson Semi Gloss).
There can be two possible issues at play here: 1) You really do have a colourcast, probably due to an inferior printerprofile ie: One that doesn't describe your printer accurately. If you use a generic profile this is hardly surprising, but if you have a custom profile it could be because the profile just isn't good enough, or that your printer have changed since it was made. 2) You can print a pretty good black and white, but it only appears neutral in daylight. This is due to metamerism (www.pixl.dk > resources > Metamerism ) - the "issue" of substrates changing appearance under different light. Frequently B&W prints from a 2100 using an RGB profil (for the Epson driver) seems magenta in tungsten, and slightly, undefinable, pretty neutral, but with just a hint of something else. > Colour > prints work well with this. The eye is much less succeptible to colour than to greyscale. To put numbers on, most colours seems acceptable until they are off by a delat E of around 3, neutrals seem unacceptable (not grey) when they reach dE 0.5 off target. > My laptop has been profiled (as much as it can > be) so what I'm seeing on screen should be right. > > I'm making black and white pics from colour by using the channel mixer and > on screen they look good. But the prints are coming with a colour cast of > green and I'm not sure what I'm doing wrong. Is it that I need a seperate > printer profile for black and white images? It depends on what the problem is. If you use a RIP that allows you control over linearization of all the inks (and you have the necessary kit or hire someone who does), you can build profiles in a different manner which can almost eliminate metamerism. For example I have an Epson 4000 that can print B&W so it looks like a photographic B&W - and is much more stable than both a Lambda print and offset. This is profiled through a RIP and the results are vastly superior to RGB profiles. It is, of course, also much more complicated and time consuming to profile and therefore more expensive. And you need a RIP on top of that... 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
