White chunks in discharge....Ink people!

[TCT]

So we just mixed up a arse load of ath. gold discharge and we are having white chunks or dots in the print.... Anyone know what is going on here? We are using CCI discharge inks, and have not come anywhere near the pigment overload threshold. 4% activator. Ideas? Help?

I'll post a pic as soon as my phone agrees to work with me.

[mk162]

yeah, you might have dry chunks of white pigment.  I would run it through a paint strainer or filter

[ScreenPrinter123]

I have also seen this caused by white screen blockout tape.  If ink gets underneath it it can get worked into the ink and deposit small chunks of white. mk's response is more likely but just thought I would add this since it is possible.

[ebscreen]

Dried pigment. Probably the biggest pain with WB inks.Certain colors worse than others.

I've never seen it in pre-mixed discharge whites.

We use hop bags from the local homebrew supply store. They're finer and more durable.

[TCT]

yeah, you might have dry chunks of white pigment.  I would run it through a paint strainer or filter

How fine of a filter are you talking? Think I could use a low number screen mesh? It is 1200grams of Ath. Gold so I hate to throw it away!

[mk162]

probably, maybe even use a 155 or so should work.  it depends on the size of the white chunks you have.  you just need to capture them, it's not like inkjet ink or your are trying to spray a car.

[Homer]

we get the "white dots" too from improperly mixed agent...we have to get out the drill and whip it....whip it good...

[TCT]

Here is a pic of what I am talking about:



Wiping it good - real good didn't work. 

[Homer]

yup. unmixed agent. scrape the side of your container, is it kind of grainy, almost gritty looking? It looks to me like it's partially mixed.

If TP could give a thumbs up/down here, that may help huh?

[TCT]

If TP could give a thumbs up/down here, that may help huh?

I was thinking the same thing! Can we start some sort of new thread/poll and have people vote and comment on how much of a help and a blessing he was? Maybe with enough people we could override the douche that complained.

[Itsa Little CrOoked]

Here is a pic of what I am talking about:



Wiping it good - real good didn't work.

I am horribly inconsistent in this board and I miss a lot of stuff, unfortunately. I have had this exact look, when I used to mix Matsui bases that called for white in the software. I would use the mat white (I forget the exact name at the moment) and mix it INTO the the clear discharge base....instead of sort of "reducing" the mat white with a little bit of clear base at a time. It just NEVER worked for me that way. The splotches I saw were DEFINITELY, 100% sure, unmixed mat white. I couldn't figure a way to strain it, but I solved the problem by mixing clear base into the more viscous mat white.

That is what your picture looks like to me, but I'm not so sure about that. It is just another possibility.

I never had too much difficulty getting my ZFS mixed in, at least that I remember. I DID use to mix ZFS into *some* of my Matsui based formulas in one/third increments for better incorporation, but I've quit Matsui bases totally. CCI bases are vastly superior for us.

[ol man]

we are having the same problem, consistently. It's definitely not zfs... and we are using mixing white ( from cci).... i've tried straining - but it takes forever through a 160 mesh.
i got a call into CCI , so if they hit back with a solution , i will post

[tonypep]

Straining is a ginormous bandaid to stop the hemorraging of the result of a bad formula. Start over and make your own. For hints chk the PW article. It is not ZFS.

[ol man]

Tony,
   thank you .