screen printing > Newbie

Rough white plastisol print -> Heatpress?

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Maxie:
You should use a thinner mesh and print flash print.
Are you printing by hand?

3Deep:
All white inks aren't the same but really any white can be worked with you just have to know how especially your cheaper white ink, as Homer would say you get what you pay for,  tight screens will improve the printability of cheaper inks plus a little additive to make it smoother.

OhNoPrinting:
yes, manual printing with a 70 durometer squeegee on a 55T white mesh (i guess it would be 140 in the US). Tiflex Himalaya (don´t think its a very cheap ink, but as stated I got it with the manual, so i can´t be sure how old it is)

I choose the mesh because the lines in one of the logos is only 0.5mm. (and the higher ones I have are dirty. I used a 90T for the black on white shirt)

I tried stroke flash stroke but moved the shirt (or it shrunk from the heat?) and it came out blurry. But when i flood, stroke, stroke, stroke it came out pretty solid white (but a bit rough).

I got also a big canister of "reducer" but i really don´t know what it is, how it will affect. Need to read up on that.

tonypep:
Premature release of ink from screen is often due to lack of off contact and elongation properties of the ink (or a combination of the two) and can result in a "rough" print. More variables of course but when I train printers, I always tell them to "read the screen". By that I mean that when you lift the screen you can often or always (with a bit of practice and observation} tell when you have a proper release of ink from screen. If you look at the screen and see ink residue, then you should rethink the application. Some white inks have an alpha prefix LE which stands for low elongation. Good consideration. Tighter screens release ink quicker and better as mentioned.
Confused? Welcome to screenprinting.
tp

screenxpress:

--- Quote from: OhNoPrinting on July 17, 2023, 02:55:40 PM ---I choose the mesh because the lines in one of the logos is only 0.5mm. (and the higher ones I have are dirty. I used a 90T for the black on white shirt)

I tried stroke flash stroke but moved the shirt (or it shrunk from the heat?) and it came out blurry. But when i flood, stroke, stroke, stroke it came out pretty solid white (but a bit rough).

--- End quote ---
Sounds like you did not have any 'tac' on the platen to hold the shirt down.  Use a waterbase tac, not spray


--- Quote from: OhNoPrinting on July 17, 2023, 02:55:40 PM ---I got also a big canister of "reducer" but i really don´t know what it is, how it will affect. Need to read up on that.

--- End quote ---
"Curable" Reducer is added to really thick ink to make it more pliable to move.  However do not add more than 10 percent or will effect the opacity of the ink. Actually start out with about 2% and gradually work up from there until its "spreadable" to your liking.  Other products such as Chino base has similar effects.

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