What’s size of dot Staccato 10 mk on the printed sheet? Theoretically – 11,5mk (if dot gain 15%)? According to my measurement on the printed sheet (plate reader VIP CAM 122): black, magenta, yellow – about 15-16 mk and cyan – 12 mk. Is it normall?
You say: «On press, those plate dots will be distorted according to the press condition (and your instrument's method of determining dot size)». OK. I understand, that my VIP CAM 122 is a plate reader, but it has the option measuring on the paper and the option AM/FM. I understand when you say “The dot sizes reported by your instrument are also affected by how it determines the threshold between what is a dot and what is not a dot”. OK.
Admit here, if I say 12 mikron – it is 12 any nominal units. 12mk = 12 n.u.. I see on plate – 10 n.u., on press Cyan 12 n.u.. Cyan – 2-th section of press, Heidelberg 102, ink-whater 35%-40%. On press B, M, Y – 15-16 n.u. The cyan’s dot is not same as the magenta’s dot. It’s normal? This observation do not change with the times. The press condition and instrument is one and the same – the dot sizes reported by my instrument are one and the same, is’t it?
If cyan may be 12 n.u., when I must obtain the same result for B,C,Y-inks? How works other print shops with Staccato screening (whish you know)? If to see his 5% dot – his instrument show him the different of measurement?
Why I say 5% – in the range 0-5% RIP generate the square dot (size of side 10.6 mk) – it’s as the atom of Staccato screening. In the range 6-99% pith up (com on) “the worms” (they made from square dots). “The worm” is as the molecule of Staccato screening. Is it all right?
Is it the good point (5%) for the press condition control of the Staccato screening? Other print houses observe this point?
Once, you attached images for AM-screening and wrote to have control out the shape and size of dot (on plate and on press). Can you attached images of the 5%-dot Staccato screening? It’s interesting for me to see the 5%-dot of any good print house (who good work with Staccato 10 mk). I do not see it in Petersburg, no one works with Staccato screening here.
We have not usb-microscope now, we are going to buy it. What is better the usb-microscope for watch Staccato (10mk) – 200x ; 5 Mb or 250-400x and 2 Mb?
G7 is a basis for “shared appearance” that aligns the appearance of diverse printing methods as closely as possible to each other...
Can I use of G7-method to align the FM-tone response to the current AM?
NDPC (CMY - only gray scale and K – only gray scale) is the standard of comparison for tone values?
I place a control strip FM (1-bit tiff) in a free space of AM press sheet. The control strip FM is the CMY-only gray (width - 5 mm) -- make it possible to see like any FM printed images. I think that tone values of the single cyan ink is not alike the cyan ink into any printed images. Cyan dots intercommunicate with other inks. It seems to me, TVI-curves – the detection method for the press (when the press have been made setting). CMY tone values is close to tone values of printed images. Can you say your opinion about it?
I'm sorry that I haven't answered so long. I had plenty of work.
I have usb-microscope now and I can show you my dots.
1_printed AM with FM_.jpg - it was printed with AM (sm 102). There was a lot of free space. I placed there control stripes FM 10 mk (1-bit tiff) and the FM-picture (10 mk). AM-picture and FM-picture are the same in colour, tone values and contrast.
Is there enough pictures for analysis or you need more info, if you need it what kind?
Thanks Gordo.
What must we do? In the first - we must decrease viscosity of our ink and decrease of a pigment (add oil to the ink)?
Thanks
Pavel
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