What are the reasons for the lack of ink density in all colors?

[ali 120]

I purchased a new type of ink, and when I ran this new type, I found that the ink density was excellent in the yellow color, and it gave a high grade with the lowest ink consumption, and when I ran the red color, the ink rolls were full of color, and it did not give a dark tone on the paper. Why, knowing that all the colors are from the same company?

 

[Jack liston]

You must be sure ink and fountain solution are compatible.if previous ink company works return to it .or have tech from New company come to shop

 

[ali 120]

You must be sure ink and fountain solution are compatible.if previous ink company works return to it .or have tech from New company come to shop

I mean, if the problem is in the moisturizing solution
Why does the yellow color give a dark color to the paper from the smallest amount of ink?
Unlike red, it does not give a dark color unless there is too much ink on the machine's rollers
Although the two are the same producing company, I think that the moisturizing solution or the fountain has nothing to do with this

 

[Adil]

Hi sir .
the difference in shade between the colors is surely a pigmentation problem when mixing the ink at the supplier. if you have little pigment in the ink you must increase the ink load, this means high consumption and possible printing problems (smearing - clogging, unstable emulsion..........) and if you have more pigment in the ink you can reduce the ink load by keeping the same shade and also you reduce consumption and avoid possible printing problems.
We provide a training about the ink and dampenning solution if you need .
Be welcome

 

[turbotom1052]

As Adi has mentioned, it sounds like the pigment load of your ink is not the same as what you were once using. Think about it for a moment.... Of all the different components that make up a can of ink it's the pigment that is the most costly ingredient in the mix. It's in the interest of SOME ink companies to cut manufacturing costs by reducing pigment load. In doing so they not only reduce manufacturing costs but as an added bonus they get to sell you more cans of ink because now with the reduced pigment load that same can of ink will not go as far, forcing you to buy more ink. This is one of the reasons that you should not buy your materials strictly on price. It just might be worth it to pay 15% more per pound of ink if it allows you to get 20% more mileage. There is an easy test to find out if what I suggest is the case. Make ready and begin a longer press run. with your control ink. When the ink water balance has settled down to a steady state condition you will want to stop the press. At this point you should record all your ink sweep settings and fountain key settings. Remove the control inks from all the ink fountains without cracking open the fountain or washing anything up. Just add an equal amount of the ink you want to test to all ink fountains. Re start the press without touching any ink zone or fountain sweep adjustments to start. Run a good 200 to 300 sheets and stop the press to regroup. Compare what you have after 200 to 300 sheets of running the new ink to what you had with the control ink. You should be able to get the press back to close color with just fountain sweep settings on all units. The difference between your fountain sweep settings once you regain color, and the old settings will tell you just how your new ink compares to the control ink as far as pigment load. This difference can be expressed as a percentage if you do the math. Compare your percentage either up or down to the difference expressed as a percentage of the inks cost. It should be noted that more strongly pigmented inks aren't always better. Too strong a pigmented ink will require you to run too thin an ink film, that could result in its own set of problems. After all of this you should be better able to decide on your ink needs.

 

[Adil]

Thank you turbotom.
Ink compositions include pigments or dyes for color, solvents or water for fluidity Solvents in ink can be water-based or organic solvents, depending on the type of ink.. , and other additives to control properties like drying time and viscosity. Additives may include stabilizers, surfactants, and thickeners to enhance performance and consistency. The exact components vary based on the ink's intended use
So,Reducing the pigment in ink can result in a lighter or less saturated color. It may also affect the ink's opacity and overall visual appearance, depending on the specific formulation and intended use.