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2004-12-23 by Andre Vallejo
I'm printing using UT-FSN inks in an Epson 1160,on EEM,with Paul's RGB Mild curves. Results are fine,but there is one problem: Some parts of my images posterize and loose all detail.. See an example of the original file in http://www.andrevallejo.net/graficos/detalhe.jpg . The parts that posterize when printed are marked in red. Anyone have an idea of why it happens? Thanks, André [Non-text portions of this message have been removed]
2004-12-23 by Paul Roark
I'd use a 21-step file to isolate the problem area and fix it on the curve. The FS inks in the 1160, however, should print with very little modification to the default curve. That is, try printing the grayscale file with no curve. The image should be a bit light but have a good ramp. If you still see posterization, it may be an indication that something is wrong. Paul www.PaulRoark.com
-----Original Message----- From: Andre Vallejo [mailto:mastologia@...] Sent: Wednesday, December 22, 2004 7:10 PM To: DigitalBlackandWhiteThePrint@yahoogroups.com Subject: [Digital BW] Posterization when printing:Why? I'm printing using UT-FSN inks in an Epson 1160,on EEM,with Paul's RGB Mild curves. Results are fine,but there is one problem: Some parts of my images posterize and loose all detail.. See an example of the original file in http://www.andrevallejo.net/graficos/detalhe.jpg . The parts that posterize when printed are marked in red. Anyone have an idea of why it happens? Thanks, André [Non-text portions of this message have been removed] Please visit the Group Homepage to check the Files, and other resources as they are often being updated. http://groups.yahoo.com/group/DigitalBlackandWhiteThePrint If you wish to receive no emails or just a daily digest, or you wish to unsubscribe, please edit your Membership preferences by visiting this same page. Please follow these basic guidelines: - As threads develop, trim off excess portions of earlier messages to keep them short. - Good manners are required at all time. No personal attacks or flames. Hostile, aggressive or argumentative users may be removed from the membership without notice. - Keep your posts and threads related to the group topic of digital B&W printing. Users who persistently make off-topic posts may be removed from the membership. - By posting on this forum you agree to abide by the group rules and guidelines, and to abide by the actions and decisions of the group Owner and Moderators. See Group Topic, Rules and Guidelines in the Files section: http://groups.yahoo.com/group/DigitalBlackandWhiteThePrint/files/ BY PARTICIPATING IN AND/OR POSTING MESSAGES TO THE DIGITAL BW, THE PRINT YAHOO! GROUP YOU EXPRESSLY UNDERSTAND AND AGREE THAT THE OWNER AND MODERATORS OF DIGITAL BW, THE PRINT YAHOO GROUP SHALL NOT BE LIABLE TO YOU FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, CONSEQUENTIAL OR EXEMPLARY DAMAGES, INCLUDING BUT NOT LIMITED TO, DAMAGES FOR LOSS OF PROFITS, GOODWILL, USE, DATA OR OTHER INTANGIBLE LOSSES (EVEN IF THE OWNER AND MODERATORS OF DIGITAL BW, THE PRINT YAHOO GROUP HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES), RESULTING FROM: (i) THE USE OR THE INABILITY TO USE THE DIGITAL BW, THE PRINT YAHOO GROUP; (ii) UNAUTHORIZED ACCESS TO OR ALTERATION OF YOUR TRANSMISSIONS OR DATA; (iii) STATEMENTS OR CONDUCT OF ANY THIRD PARTY ON THE DIGITAL BW, THE PRINT YAHOO GROUP; OR (iv) ANY OTHER MATTER RELATING TO THE DIGITAL BW, THE PRINT YAHOO GROUP. Yahoo! Groups Links
2004-12-23 by Andre Vallejo da Silva
Thanks Paul,I'll try both ways and let you know what happened. Best, André Vallejo --- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Paul Roark" <paul.roark@v...> wrote: > I'd use a 21-step file to isolate the problem area and fix it on the curve. > The FS inks in the 1160, however, should print with very little modification > to the default curve. That is, try printing the grayscale file with no > curve. The image should be a bit light but have a good ramp. If you still > see posterization, it may be an indication that something is wrong. > > Paul > www.PaulRoark.com ! Groups Links
2004-12-23 by Andre Vallejo da Silva
Just printed the 21 step file and it seems that from 65 to 80,it all looks pretty much the same.So I guess this is the problem. Can you give me some hints on how to modify the curve? I've been looking at it,and noticed that it has 15 points,where I expected 10 or 20,so I got a bit lost... Best, Andre > > --- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Paul Roark" > <paul.roark@v...> wrote: > > I'd use a 21-step file to isolate the problem area and fix it on > the curve. > > The FS inks in the 1160, however, should print with very little > modification > > to the default curve. That is, try printing the grayscale file > with no > > curve. The image should be a bit light but have a good ramp. If
> you still > > see posterization, it may be an indication that something is > wrong. > > > > Paul > > www.PaulRoark.com > ! Groups Links
2004-12-23 by Paul Roark
Andre, >Just printed the 21 step file and it seems that from 65 to 80,it all >looks pretty much the same.So I guess this is the problem. Can you >give me some hints on how to modify the curve? ... Have you checked that the inks are in the right places? For example, in a purge 4 print, the C should be by far the darkest of the grays, but not as dark as the K. The Y is the lightest, and M is also quite light. If you are using the Mild partitioning curve, what you describe is almost as if the Y or M are too dark. Their curves do go relatively flat in the area you're describing. Assuming the inks are in the right places, the red curve, controlling the dark gray ink, gives you the most control. You can probably adjust the points in that area and solve the problem. The test strips on my web page have labels that might be useful in relating the various numbers that will appear on the test strips and curves boxes. See the index at http://home1.gte.net/res09aij/index.htm. Hope this helps. Paul www.PaulRoark.com > > --- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Paul Roark" > <paul.roark@v...> wrote: > > I'd use a 21-step file to isolate the problem area and fix it on > the curve. > > The FS inks in the 1160, however, should print with very little > modification > > to the default curve. That is, try printing the grayscale file > with no > > curve. The image should be a bit light but have a good ramp. If > you still > > see posterization, it may be an indication that something is > wrong. > > > > Paul > > www.PaulRoark.com > ! Groups Links Please visit the Group Homepage to check the Files, and other resources as they are often being updated. http://groups.yahoo.com/group/DigitalBlackandWhiteThePrint If you wish to receive no emails or just a daily digest, or you wish to unsubscribe, please edit your Membership preferences by visiting this same page. Please follow these basic guidelines: - As threads develop, trim off excess portions of earlier messages to keep them short. - Good manners are required at all time. No personal attacks or flames. Hostile, aggressive or argumentative users may be removed from the membership without notice. - Keep your posts and threads related to the group topic of digital B&W printing. Users who persistently make off-topic posts may be removed from the membership. - By posting on this forum you agree to abide by the group rules and guidelines, and to abide by the actions and decisions of the group Owner and Moderators. See "Group Topic, Rules and Guidelines" in the Files section: http://groups.yahoo.com/group/DigitalBlackandWhiteThePrint/files/ BY PARTICIPATING IN AND/OR POSTING MESSAGES TO THE DIGITAL BW, THE PRINT YAHOO! GROUP YOU EXPRESSLY UNDERSTAND AND AGREE THAT THE "OWNER" AND "MODERATORS" OF DIGITAL BW, THE PRINT YAHOO GROUP SHALL NOT BE LIABLE TO YOU FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, CONSEQUENTIAL OR EXEMPLARY DAMAGES, INCLUDING BUT NOT LIMITED TO, DAMAGES FOR LOSS OF PROFITS, GOODWILL, USE, DATA OR OTHER INTANGIBLE LOSSES (EVEN IF THE "OWNER" AND "MODERATORS" OF DIGITAL BW, THE PRINT YAHOO GROUP HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES), RESULTING FROM: (i) THE USE OR THE INABILITY TO USE THE DIGITAL BW, THE PRINT YAHOO GROUP; (ii) UNAUTHORIZED ACCESS TO OR ALTERATION OF YOUR TRANSMISSIONS OR DATA; (iii) STATEMENTS OR CONDUCT OF ANY THIRD PARTY ON THE DIGITAL BW, THE PRINT YAHOO GROUP; OR (iv) ANY OTHER MATTER RELATING TO THE DIGITAL BW, THE PRINT YAHOO GROUP. Yahoo! Groups Links
2004-12-23 by Andre Vallejo da Silva
Thanks Paul,I'll check it all and work on that... Andre > > The test strips on my web page have labels that might be useful in relating > the various numbers that will appear on the test strips and curves boxes.
> See the index at http://home1.gte.net/res09aij/index.htm. > > Hope this helps. > > Paul > www.PaulRoark.com >Links