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+   T-Shirt Forums > T-Shirt Industry Information > Direct to Garment (DTG) Inkjet Printing > Brother > [Brother GT-381] Help!how to refill white ink into Brother GT381,any method just refill manually?who can Install a white ink self circulation system to the machine?
Thread: Help!how to refill white ink into Brother GT381,any method just refill manually?who can Install a white ink self circulation system to the machine? Reply to Thread
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Topic Review (Newest First)
May 31st, 2017 11:17 PM
NZACO
Re: Help!how to refill white ink into Brother GT381,any method just refill manually?who can Install a white ink self circulation system to the machine

Yes the GT printers are designed for indrustral printing and not for printing 1 or 10 shirts per week. So 'ganging' jobs that require white ink together is a good idea.
May 31st, 2017 08:27 PM
cathy008
Re: Help!how to refill white ink into Brother GT381,any method just refill manually?who can Install a white ink self circulation system to the machine

https://www.t-shirtforums.com/brother/t751705.html i find the source, hope helpful for you.
Regards,
May 31st, 2017 08:13 PM
cathy008
Re: Help!how to refill white ink into Brother GT381,any method just refill manually?who can Install a white ink self circulation system to the machine

hi ,thanks for your reply.
1.yes, i am here talking about compatible ink not ORIGINAL BROTHER INK
2.Yes, Brother has Refill machine which has two mood "refilling"and " circulation".one of my USA client shows me the machine photo.
3.Have you operated a Brother GT machine before?

thanks,
May 31st, 2017 08:07 PM
cathy008
Re: Help!how to refill white ink into Brother GT381,any method just refill manually?who can Install a white ink self circulation system to the machine

hi james,thanks for your attention.
But sorry,i dont remeber the source/.i did found that on T-shirtforum about 2 months ago,at the same time i record another post about comparison among Brother GT361/381/341 and the maintainance anf cost... queted as below for your reference. same from T-shirtforum

"Our Direct to Garment (DtG) printer is a Brother GraffiTee-3 (GT-3) unit. This unit can be set up in three different modes depending on how many or few white-ink channels are needed. A GT-341 has just the 4 CMYK channels and no white ink printing ability, the GT-361 has all CMYK and 2 white ink channels, and the GT-381 has CMYK and all 4 white ink channels. Our unit can be set up for any of these printing situations, but will most commonly be used as either a 341 or 361 for cost reasons.
The GT-3 uses an industrial ink-jet print head designed to handle heavy particles of ink needed to print on garments. The CMYK inks are similar to pigment based inks found in other inkjet printers and are relatively gentle on the ink lines, filters, pumps, and print-heads. CMYK printing has excellent vibrancy and uses relatively little ink per shirt, which makes it affordable, durable, and all around groovy. The White ink used for printing has much heavier particles and can easily clog many parts of the printer which means the maintenance routine either needs to be followed strictly, or the mistakes will be very expensive. Even simple mistakes such as forgetting to shake the ink, failing to move enough ink daily to keep the lines clear, printing with expired white ink, or not performing a weekly tube flush could all result in hundreds to thousands of dollars in damage. Unfortunately, we don’t really print enough white-ink shirts (15 per day) to keep the machine happy, so it requires even more maintenance. A rough estimate put a daily white ink flush costing around $3, and a weekly tube cleaning around $7 per tube. This is why the machine is typically used for CMYK or only 2 White channels at a time, to keep this routine maintenance down.
White ink line which are not printing several shirts per day are essentially burning money as they have white ink regularly pumped out of them. To combat this, the white ink lines are regularly kept hibernating. This involves performing a white-ink flush, which will result in the end with ink lines full of maintenance solution. This solution can also clog the print heads, but it takes 4-6 weeks instead of a few days. While the printer has maintenance solution in the lines there should be filter cartridges capping the lines or the maintenance solution can contaminate the white ink carts.
If all of the white-ink lines are filled with maintenance solution and capped with filter carts then the machine can be put into “GT-341 Mode (No White)” which is available in the printer settings through the control panel on the printer. This will prevent the machine from trying to regularly clean the unused heads, and stop the user from accidently sending white-ink jobs to the printer, which could cause all sorts of problems. It is still good to set the printer back to “Normal Mode (White Ink)” once every couple weeks and perform a “White Tube Flush” for each white ink channel with the maintenance cart in place, the air cap closed, and let fresh maintenance solution purge the old stuff from the lines and heads. Without this some damage could occur. Some users report similar success performing this step simply using bottled water (do not use tap water), which is much more affordable than the maintenance solution.
This is all maintenance which is not included in the regular maintenance routines for the printer, but those routines were written for shops printing 100+ white ink shirts each week, which we are not. We are doing something called “Ganging White Ink Jobs.” This means saving the few jobs which require white ink all for one time, filling the first two lines (W1 & W2) of the printer with white ink and sending jobs as GT-361 print jobs. Then, when we’re done printing white ink jobs those first two lines are once again filled with maintenance solution and capped with filter carts. This is our GT-3s resting white-ink state. CMYK only jobs can still be sent to the printer in GT-341 mode. The one issue which can arise from printing this way is maintenance solution dripping from the heads. This is rare but easily solved by simply flushing the dripping line with maintenance solution and putting the filter cart back in place.
Considering the rather excessive cost of daily maintenance, or even just the cost of filling the white ink lines and then flushing them out again, it is usually more cost effective to simply avoid small white-ink jobs all together. CMYK printing on a light garment is more vibrant, holds up longer, works on polyester & cotton, and costs both us and the customer less money. CMYK printing does not work on dark garments though. For dark garments it is better to use screen printing for order of 20+ shirts, or vinyl heat transfers for smaller orders with simple graphics. Both screen printing and vinyl are also more durable, more solid in color, work on both polyester & cotton, and leave no ugly pre-treatment on the shirt.
It’s really only small orders of full color prints on dark 100% cotton garments where the GT-3 white ink printing is useful, and these are not the most common orders."
May 31st, 2017 07:34 AM
NZACO
Re: Help!how to refill white ink into Brother GT381,any method just refill manually?who can Install a white ink self circulation system to the machine

Quote:
Originally Posted by cathy008
"Every morning I come in, move the ink lines and lightly flick the lines going into the dampers, I turn on the machine and then shake, agitate, the white ink bag. This also sends vibration down thru the ink lines to the dampers. I run a nozzle check.. see if anything is missing, then if so, I run a simple clean... shaking, agitating, the white ink bag again. Run another nozzle check. May or may not have to do another simple clean.. If there is a lot of bubbles in the with ink lines at the dampers.. do an ink pull with your syringe. Nozzle check again.--------from a GT381 user.
Where did you find this information because the GT printers don't have bags, you can not flick the lings going into the white print heads and you can not see bubbles in the white ink lines.

Please show your source of information.
May 31st, 2017 06:18 AM
FBNick
Re: Help!how to refill white ink into Brother GT381,any method just refill manually?who can Install a white ink self circulation system to the machine

I work for a third party ink manufacturer so I feel confident in saying this. There are no true GT3 inks on the market apart from Brother, and those that claim to be are bound to be unreliable and/or unstable.

Brother printers are actually pretty well known for being absolute workhorses and are among the most forgiving white ink printers.

Brother itself actually offers a bulk ink system to certain customers, but this is solely through Brother.
May 31st, 2017 04:19 AM
cathy008
Re: Help!how to refill white ink into Brother GT381,any method just refill manually?who can Install a white ink self circulation system to the machine

Hi WGiant,Thanks for your feedback,
1. I heard that the original ink especially the white ink have the same trouble,too.that's why there are huge numuber GT381 users compain about the machine and ink on T-shirtforum.Quoted the Post by a GT381 users as below
"Every morning I come in, move the ink lines and lightly flick the lines going into the dampers, I turn on the machine and then shake, agitate, the white ink bag. This also sends vibration down thru the ink lines to the dampers. I run a nozzle check.. see if anything is missing, then if so, I run a simple clean... shaking, agitating, the white ink bag again. Run another nozzle check. May or may not have to do another simple clean.. If there is a lot of bubbles in the with ink lines at the dampers.. do an ink pull with your syringe. Nozzle check again.--------from a GT381 user.

2.Plan A:EXPENSIVE ORIGINAL INK+cleaning fee+head change fee.
Plan B:Stable and cheap ink +cheap cleaning fee+head change fee.

So there are lots of Brother GT users want to try the ink.
The pursuit of benefit is human nature.

3.No matter original ink or compatible ink the machine should be carefully maintained.

4.Fankly,the bug of GT381 is no white ink self-circulation system.that is the source of all problems.Nowadays,most of DTG printers ion market are equipped with the system,such as Kornit storm series,Epson DX4/5/6/7/5113/TFP head printer.

5.After all,Brother GT series is high speed dtg printer with industrial head and productive.
the machine will make money for people if it is operated correctly.

Waiting here for GT381 senior players~

thanks,
May 28th, 2017 08:42 AM
WGiant
Re: Help!how to refill white ink into Brother GT381,any method just refill manually?who can Install a white ink self circulation system to the machine

Quote:
Originally Posted by cathy008
Hi, one of my clients got a brother GT381,considering the huge ink cost and cleaning fees,she refer to us for compatible inks.she got a refill machine to test our ink,and come out perfect results.
I really don't think this is a good idea. How are you insuring all of the heavier particles are being cleaned out of the supply source before they have a chance to coagulate into a head clogging nightmare? Sure it will print great for a month, maybe even six months, but before a year is out something has built up, broken free, and at best clogged a filter, but more likely jammed up a $1k print head, and this beauty has 4 of those all just waiting for a moment like this.
May 25th, 2017 02:22 AM
cathy008
Re: Help!how to refill white ink into Brother GT381,any method just refill manually?who can Install a white ink self circulation system to the machine

Hi, one of my clients got a brother GT381,considering the huge ink cost and cleaning fees,she refer to us for compatible inks.she got a refill machine to test our ink,and come out perfect results.

1.problem is ,there are many users who dont want to spend money to buy a refill machine. Is there any method to refill the ink mannually?showing step by step process will be highly appreciated.

2.is there any professional vendor who can Install a white ink self-circulation system to Gt381?

thanks,
Goosam tech

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