Schwarz 100% K und Schwarz aus 100% CMY

[BR112]

Hallo,

ich drucke mit dem weißen Toner von Ghost und dem Canon LBP633cdw.

Um weiss drucken zu können muss man wie gewohnt die bestimmte Fläche im Illustrator schwarz färben. Das man den Drucker so austricksen kann, ist bekannt. 
Da man jedoch den schwarzen Toner durch den weißen ersetzt hat, kann man nun kein Schwarz (100% K) mehr drucken. Schwarz kann man nun aber auch, wie bekannt ist, aus 100% CMY mischen. Jedoch denkt der Drucker auch in dem Fall, dass er weiß drucken soll.

Frage: Wie kann ich den Drucker, evtl. auch über den Illustrator, so austricksen, dass er nur bei 100% K weiß, jedoch bei 100% CMY schwarz druckt? 
Ich bin noch recht neu, etwas überfragt und habe diesbezüglich auch nichts gefunden.

Bisher habe ich das Blatt immer zwei Mal durch den Drucker gejagt und den weißen Toner gegen den Schwarzen und andersherum ersetzt. Da ich jedoch auch Grafiken erstelle, bei denen beide Farben übereinander liegen, ist dieses Vorgehen mehr als blöd und führt zu Ungenauigkeiten.  

Liebe Grüße 

[Jacob Bugge]

BR112,

There is a limit to the TIC = Total Ink Coverage (also called TAC = Total Area Coverage), and you may be able to see it in the printer manual, or ask Canon.

There is a saying in English: the proof of the pudding is the eating (I wonder whether there is something similar in German).

You can try out different things and see the outcome, maybe start by making some test prints (small areas at least to start with) and try

• 100%C+100%M+100%Y,
• 100%C+100%M
• Other percentages of C+M+Y or C+M
• 100%K

and compare the actual colours with 100%K as the reference colour, to see whether which combination(s) can give you a suitable black, including which percentages are enough.

But I have another question:

Do you need to use all of C and M and Y together with white in the same print?

Otherwise, I suppose you can replace the unneeded one with white and use K as usual.

[BR112]

Thank you for your detailed answer! I'll try the tips out right away. Then I'll get in touch again.

Exactly, I need to use white and black in one print. The black should be above the white.

[Jacob Bugge]

You are welcome, BR112.

I am still unsure: Do you need all of the other inks Cyan, Magenta, and Yellow, in the same print as the white and (some form of) black?

If not, I suppose you can replace the unneeded ink with white and use the normal K black.

[BR112]

Thanks again for the answer!

Exactly, I need CMY and the white. The white should be the primer and CMY (100% each) should be a black font over it.

[Jacob Bugge]

Thank you for the clarification, BR112.

I can see that you need to replace the black with white.

You can still try and compare as suggested and consider which CMY combination may create a suitable black, and you can see directly what happens at different high TIC values.

It may also still be worth looking at the manual and asking Canon.

In addition, some of our forum friends have deep knowledge about TIC limits (which are more well described for other kinds of inks).

What say you, Bobby? @Bobby Henderson 

[BR112]

Thank you very much! I tried mixing CMY so that black came out (99% C; 100% M; 100% Y). Unfortunately, after printing it looked like the photo. It was black on the screen. A completely different problem is that all colors are so transparent after printing that they become dark on dark surfaces. Example: Blue turns black on red. I heard that in this case you can put the color white under the graphic (everything that is to be printed goes on a different layer). Unfortunately this doesn't work in my Illustrator. I create rub-on decals. Therefore, the white must be on top so that it will later be on the bottom of the target object (rub-on decals are always applied in a mirror image). But I can't manage to print two colors on top of each other. Example: Blue below, white above. I've tried everything possible, but it doesn't work. Do you also have an idea? Thank you in advance!

[Jacob Bugge]

BR112,

Still pondering over this. What exactly is shown in the image?

To me it looks like something quite different to a normal print on paper, which I imagined for the test(s) to find a suitable CM(Y) black.

My suggestions for the colour testing was based on an assumption of normal print on normal paper, the rub on decal use being a new aspect.

As I have understood, it is recommended to first test the colours, and the artwork, on normal paper, then proceed with decal paper that is designed for use with laser printers and has a glossy finish.

So it may still be worth starting with normal print to test the CM(Y) black colour.

I imagine the strange issue dhown in the image may be related to the choice of (decal) paper.

Anyroad, I hope that someone with laser based rub on decal creation can help.

Someone?

By the way, it is much easier for helpers if you use the Insert Image Photos button at the top of the Reply box (looks like moon over mountains) so the image appears directly visible in your post, rather than the more conspicuous attachment where it is necessary to open it separately.

[Bobby Henderson]

I'm not familiar with the printer model you're using but my workplace we have a couple of large format printers that can print white ink in addition to the usual ink colors. We have to define the white ink on objects with a custom named spot color, such as "Spot1" to make the printers output the white ink. Check your printer's documentation to see if you may need to use a similar approach.

[BR112]

Thanks! Do I have to set this in Illustrator or in the printer itself?

[Bobby Henderson]

With our large format print setup we have to do things to the artwork within Adobe Illustrator. Any objects I want printed with white ink I'll apply a custom spot color called "Spot1" to the fill. When the RIP application sees that name applied to the object fill it will apply white ink. The same thing goes for contour cutting. In Illustrator I have to apply a spot color called "CutContour" to an object's outline stroke in order for the RIP software to cut that line when the print is loaded into a vinyl cutter.