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New Gimp White Underbase with 3 Color Composite Printing

[DIY DTG] 
81K views 565 replies 24 participants last post by  bangkandim 
#1 ·
Hey Team! I just finished programming the Gutenprint definition files for the 1100 and 1400 to allow printing a white under-base with 3 color composite. It has been altered to print four passes of each color. This should lay down a sufficient amount of ink to make a good print. This is experimental and no warranties are explicit or implied. I don't believe it can cause any harm to your printer. Give it a try and see if it fits your needs.

On the 1100 replace both black with white.

On the 1400 replace the black, light cyan and light magenta with white.

http://diydtg.wikispaces.com/Gimp+Color+&+White+Printing

Post your experience here...

Thanks,

Bob ?;O)
 
#180 ·
...Continued. White improved on two passes but colour not improved.

I printed 3 passes with colour without much success. I increased the density of the cyan without any noticable improvement. I stuck a piece of coloured paper over the print to see what was happening and cyan appears VERY faint and yellow and red appear faint. I then used a different program to print the file again to check the printer and this is what I got. I go back to my theory that the cyan channel is not printing or printing with white alongside.

BTW the bottom 'other' print was done in one pass.

I have other photos but I'm still struggling to upload hence the two posts.

Onwards..... :)

Bob
 

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#182 ·
looks like ya head is blocked to me mate i have a r1800 and get gd results i have no ink atm waiting to get some when i get some cash lol

here are some photos i found using gutenprint i bilieve 720 but not sure and this was the earlie version of gutenprint so no quality enhancment on it only white tshirts but vibarante colours hope this helps anyone the way bob has ajusted gutenprint xml is the way i done it to print white sorry no pics




 
#183 ·
looks like ya head is blocked to me mate i have a r1800 and get gd results i have no ink atm waiting to get some when i get some cash lol

here are some photos i found using gutenprint i bilieve 720 but not sure and this was the earlie version of gutenprint so no quality enhancment on it only white tshirts but vibarante colours hope this helps anyone the way bob has ajusted gutenprint xml is the way i done it to print white sorry no pics
Robert, Nice work... Thanks!

Bob ?;O)
 
#186 ·
also with the r1800 its pointless using rgb as there is that over cartridge there so not using it is a waste you will get a better black by using black obviously

also if you have to use rgb are you converting it to rgb format so the colour correction is ok overwise blue is a horrible colour for printing its a ***** when i do artwork i always use cmyk and try to keep my colours 100% cmyk or a mix so my printer noes what to do with the colours gutenprint is great at this we need it totaly optimised for dtgs tho so we can put down more ink on one pass
 
#188 ·
None have volunteered. I guess it's just you and I chum... I'm working on a plugin for Gimp. This should be a good exercise in understanding the mechanisms needed. The biggest problem is that Gimp and Gutenprint were written for 'nix based systems. A full conversion means compiling CUPS, Gimp and Gutenprint... Not fun.

Yes, I agree that perhaps we should just remove the 3 composite option for the 1400 and up... I'll give it another look over soon. I'm tied up till Thursday.

Bob ?;O)
 
#191 ·
I'm printing just the coloured section onto a black shirt using GutenRIP to try to find out why the colours are very faint in the 1400 version.

First off when I printed to black, no white appeared so the cyan is not printing white :)

I then printed onto white paper and got much as I did in my previous post (461).

I then did a nozzle check on pink and couldn't see white or yellow (not surprisingly) but could see red and blue.

I then printed to pink card to try to see if white was involved at all with the same results.

I then printed the same file using 'Print' in gimp onto pink card with this result (462).

And just in case... (463) :)

QQBob
 

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#193 ·
Right then.....

I did a print off my normal 1400 using GIMP -> Print which is 469.

I did the same off my DTG 1400 set up with white configuration using GIMP -> Print which is 468.

I then did GIMP -> GutenRIP which is 470.

Then just to prove the printer again, 471.

The funny thing is that blue seemed to be missing from the robot but is the only thing printing in this. No faint colours.

I'll leave the DTG 1400 set up like this for the rest of the week.

I'm going to be working on my R1800 this week so I can't wait to try the RIP on that :))

Hope this helps.

QQBob
 

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#204 ·
Rob, He's getting ink out of every print but with the 1400 GutenRIP... I don't quite understand it. Can anyone else verify this is case. I was able to print with the 1400 GutenRIP in 3 color composite mode just fine (Using standard Epson Inks). I don't quite understand his issue unless he is using an older copy of GutenRIP...

I use my 1400 for printing separations so I won't be building a 1400 DTG. I will only stay with the 1100 as an entry level DTG from now on.

QBob, did you download and install the latest version of GutenRIP?

Bob ?;O)
 
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