durst 670 orang negative mask

[danzyc]

hello friends...the next week i wil make the first color print....i have durst 670 color, my friend told me that for the color print i should disable in the enlarger the ORANGE NEGATIVE MASK....mhnnnnnn.....help me...

:-(((((

 

[nickandre]

If you have a color head start at 25m 25y and work from there. Do a test strip and then confirming strips as you work your way along. Make sure you look at your print in the same light balance that you will be viewing the final print. You should print out a cheat sheet that says "if print is too yellow, add yellow" or whatever. Don't get it backwards!

 

[danzyc]

thank...if the paper pack indicate 45m and 45y i should add 25? 25+45 = 70 ??? kodak vieving filter is useful??

thanks

 

[Domin]

Actually it's not that simple. First, the filtration scale on Durst color head might be different than Kodak CC. My color head has even a conversion table painted on itself. But that's not very important. If you get starting point wrong it's just matter of one or two more tests to get it right.

Second, "just do some test strips" might be not enough for first timer. For sure test strips didn't work for me when I did my first color print. I might be lacking in talent or experience with colors but then when I made a test strip with one exposure and tried to judge how to change filtration just by looking at it I found that I would make a lot of strips and still miss the right filtration going around in circles.

What worked for me was making tests on whole sheets of paper (at that time it was 20x25cm); I would make 4 different exposures of same area on one sheet. One for starting point and one with same change of filtration in each direction: SP, SP + some cyan, SP + some magenta, SP + some yellow. Then I would take the one witch looks best as new starting point and make next test with the "some" value halved.

 

[wogster]

Actually it's not that simple. First, the filtration scale on Durst color head might be different than Kodak CC. My color head has even a conversion table painted on itself. But that's not very important. If you get starting point wrong it's just matter of one or two more tests to get it right.

Second, "just do some test strips" might be not enough for first timer. For sure test strips didn't work for me when I did my first color print. I might be lacking in talent or experience with colors but then when I made a test strip with one exposure and tried to judge how to change filtration just by looking at it I found that I would make a lot of strips and still miss the right filtration going around in circles.

What worked for me was making tests on whole sheets of paper (at that time it was 20x25cm); I would make 4 different exposures of same area on one sheet. One for starting point and one with same change of filtration in each direction: SP, SP + some cyan, SP + some magenta, SP + some yellow. Then I would take the one witch looks best as new starting point and make next test with the "some" value halved.

Back when I did colour printing, I found that the best place to start was to set the filtration to the paper package settings, then do tests to get the exposure right, and make a print, I knew the filtration could be off, but I could then evaluate the filtration with the proper exposure using a Kodak filtration viewing kit (I still have it). Apply some filter factors when changing the filtration to keep the exposure a constant.

 

[nickandre]

I just said 25 25 because that's a medium value. You can start at whatever you want, it just may be further away and take more work to achieve optimal color balance. It depends on your enlarger greatly. Use confirming strips and pull the colors out until you get a neutral picture.

You should judge color balance from confirming strips. My problem at first was that I couldn't tell that I was bringing the color balance in the wrong direction because I started judging from a test strip. Use a test strip to find the base time. You'll have to adjust as you change the filtration.

Also leave the cyan dial alone. If you need to add cyan subtract magenta and yellow equally. You generally shouldn't need the cyan dial for color negative printing.