screen printing > Waterbase and Discharge
Waterbase flukes
tonypep:
Its not the garment, press or screen, its the ink. Usually poor pigment grind. Can be found in either RFU or pigment/base. Most commonly found in red shade yellows and anything with yellow in it. Most pigments start out as cakes or powders and must be milled to a particular specific size and the better (more expensive ones) are milled in stages until they reach the specified particle size. Also could be impurities.
brandon:
--- Quote from: cclaud3 on January 10, 2024, 10:47:17 AM ---We started with Matsui but the wet on wet wasn't working on DC or Medium solids. Skin-like build up on bottom of screen.
Tried aquarius, printed the same as Matsui.
For the last few years we have been Magna pigments and bases with CCI activator.
--- End quote ---
Just curious why are you using the CCI activator with Magna instead of the Magna activator??? Magna is what we switched everything too
cclaud3:
It's about a 1/3 less in price, easy to get and worked fine until a month ago. When we first started reps from each company said that activator is activator.
Just finished 960 DC prints on Gildans without any problems...not sure what is going on.
brandon:
--- Quote from: cclaud3 on January 10, 2024, 01:44:45 PM ---It's about a 1/3 less in price, easy to get and worked fine until a month ago. When we first started reps from each company said that activator is activator.
Just finished 960 DC prints on Gildans without any problems...not sure what is going on.
--- End quote ---
I used to think that too but I just asked our production manager about when we were switching over and she confirmed that issues would arise when we tried to clear out the CCI activator by using it with the Magna inks. Like Tony said above things are milled / grinded differently. And I have been told that some activator is a ground to a finer powder hence the higher price. I believe the less the grind it seems to clump more even if small clumps / streaks its still annoying
ebscreen:
FWIW when I was mentioning oil spots I was referring to machine oil from the mill, not your press.
IE the kind that you'll see on white/light garments, but may not be visible on darks, unless you
print a reactive ink over them.
When Rutland WB-99 was discontinued (the bastards) we went to CCI pigs.
(had been using their bases for years). We've since seen odd stuff happen like this as well,
so we're on our way over to Matsui now.
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