Hello,

Am Dienstag, 23. September 2008 10:36:18 schrieb Dotan Cohen:

My printer has a stuck blue nozzle and I am trying to clean it. Of the blue, yellow, red, and black cartridges, I want to only print from the blue. I tried to configure a blue-255 colour and the rest 0, however the printed image still uses a bit from the red cartridge as the choice of colours differ from those in Gimp. What colour could I configure, that would translate to blue only from the printer?

Printers are normally CMYK, not RGB. That is why 0000ff will also utilize the other cartridges of the printer, not only cyan. You will therefore have to select 100% C from CMYK colourspace in order to only print from the C cartridge - which is a bit awkward in Gimp, since the program has no direct CMYK support. Nevertheless, you can do so with the colour selector (get to the printer colour selection mode for CMYK colours). The colour will be translated to RGB 00ffff...

HTH

Torsten

Dotan Cohen wrote:

My printer has a stuck blue nozzle and I am trying to clean it.

The simplest solution is to run multiple cleaning cycles to clear the nozzles. I had an inkjet printer where multiple nozzles were clogged. It took about three or four of the printers built-in cleaning cycles to fully unclog all holes in all of the cartridges.

On Tuesday 23 September 2008 05:20:47 am Torsten Neuer wrote:

Hello,

Am Dienstag, 23. September 2008 10:36:18 schrieb Dotan Cohen:

My printer has a stuck blue nozzle and I am trying to clean it. Of the blue, yellow, red, and black cartridges, I want to only print from the blue. I tried to configure a blue-255 colour and the rest 0, however the printed image still uses a bit from the red cartridge as the choice of colours differ from those in Gimp. What colour could I configure, that would translate to blue only from the printer?

Printers are normally CMYK, not RGB. That is why 0000ff will also utilize the other cartridges of the printer, not only cyan. You will therefore have to select 100% C from CMYK colourspace in order to only print from the C cartridge - which is a bit awkward in Gimp, since the program has no direct CMYK support. Nevertheless, you can do so with the colour selector (get to the printer colour selection mode for CMYK colours). The colour will be translated to RGB 00ffff...

HTH

Torsten

ImageMagick will convert from rgb to cmyk after saving the file from Gimp. If the above RGB 00ffff is used then it should convert to Cyan (not exactly blue.)

On Tue, 23 Sep 2008 11:26:28 -0400 John Culleton wrote:

On Tuesday 23 September 2008 05:20:47 am Torsten Neuer wrote:

Hello,

Am Dienstag, 23. September 2008 10:36:18 schrieb Dotan Cohen:

My printer has a stuck blue nozzle and I am trying to clean it. Of the blue, yellow, red, and black cartridges, I want to only print from the blue. I tried to configure a blue-255 colour and the rest 0, however the printed image still uses a bit from the red cartridge as the choice of colours differ from those in Gimp. What colour could I configure, that would translate to blue only from the printer?

Printers are normally CMYK, not RGB. That is why 0000ff will also utilize the other cartridges of the printer, not only cyan. You will therefore have to select 100% C from CMYK colourspace in order to only print from the C cartridge - which is a bit awkward in Gimp, since the program has no direct CMYK support. Nevertheless, you can do so with the colour selector (get to the printer colour selection mode for CMYK colours). The colour will be translated to RGB 00ffff...

HTH

Torsten

ImageMagick will convert from rgb to cmyk after saving the file from Gimp. If the above RGB 00ffff is used then it should convert to Cyan (not exactly blue.)

Cheaper printers are RBY, not CMYK. He never said he had an RGB printer. (I don't think anyone even makes an RGB printer.) My HP printer, for example, had a Red-Blue-Yellow cartridge and a black one. I do have another printer that is CMYK.

Best suggestion so far is to use the printer's clean mode. Otherwise, I don't see a big problem with a little bit of red leaking through.

-d

On Tuesday 23 September 2008 19:11, Dotan Cohen wrote:

2008/9/23 Kevin Cozens :

Dotan Cohen wrote:

My printer has a stuck blue nozzle and I am trying to clean it.

The simplest solution is to run multiple cleaning cycles to clear the nozzles. I had an inkjet printer where multiple nozzles were clogged. It took about three or four of the printers built-in cleaning cycles to fully unclog all holes in all of the cartridges.

I've run tens of passes. Everything is clean but the blue reservoir, which is stuck real bad. I'm cleaning it with spit, printing, spit, printing, but I have a long ways to go and I'd like to not waste the ink from the other reservoirs. That's why I'd like to print only blue.

Spit is probably one of the worst cleaning solvents you can use... The nozzles are so small that particles in your spit will clog them.

This is how the printer technician at my work does it: Place the cartridge head down in a shallow bowl with clean water. Leave it in for a few hours, wipe it of gently with a clean cloth rag. Do NOT use tissuepaper!
Make sure its dry before you place it back into the printer again. This might have to be repeated, but its safe for the nozzles and ink.

On Friday 26 September 2008 01:46, Dotan Cohen wrote:

2008/9/25 Rikard Johnels :

Spit is probably one of the worst cleaning solvents you can use... The nozzles are so small that particles in your spit will clog them.

This is how the printer technician at my work does it: Place the cartridge head down in a shallow bowl with clean water. Leave it in for a few hours, wipe it of gently with a clean cloth rag. Do NOT use tissuepaper!
Make sure its dry before you place it back into the printer again. This might have to be repeated, but its safe for the nozzles and ink.

Thank you, I will try that. I am wary of water and electronics, but the cartridge is pretty much all PET or ABS, and I do believe that the ink is water based.

Just a fraction of an inch of water. Dont submerge the whole thing.
You only need to "wet" the nozzles.

Another method is to leave the cartridge overnight in a sealed plastic bag with a piece of wet cloth or similar inside. Of course it won't work as fast as submerging the nozzle in water, but then you don't risk flooding the cartridge either.

This is how the printer technician at my work does it: Place the cartridge head down in a shallow bowl with clean water. Leave it in for a few hours, wipe it of gently with a clean cloth rag. Do NOT use tissuepaper!
Make sure its dry before you place it back into the printer again. This might have to be repeated, but its safe for the nozzles and ink.

Thank you, I will try that. I am wary of water and electronics, but the cartridge is pretty much all PET or ABS, and I do believe that the ink is water based.

Just a fraction of an inch of water. Dont submerge the whole thing.
You only need to "wet" the nozzles.