T-Shirt Forums banner

Printing Problem: Smudge on Water-based Silk Screen Print

7.1K views 4 replies 4 participants last post by  jockey72  
#1 ·
Hi! I would like to ask some advice regarding water-based silk screen printing. I've been having this problem on a lot of prints occasionally. Sometimes there are smudges, sometimes there aren't.

My setup is on a line table. I used plywood for the platens and wooden screen frames. My mesh is 120 (we stretch it ourselves using the nails (poor man's stretcher) method, so I am not 100% sure whether the screen tension is correct)
We use 1 peso coins for the offset (sometimes one, sometimes two on all corners)
Our ink is waterbased bought from Tulco (local supplier)

When printing, what I do is I spray a few drops of water on the screen, then put the ink mixture and flood the screen.
The flooding is necessary because it is fairly hot in our area, thus the ink dries fast if not flooded.

The artwork I am printing now is almost as big as the squeegee I'm using [11 inches width]. (Should I buy a larger one?)
I am not yet an expert on printing so the way I flood the screen, the way I pull the squeegee,ink consistency and screen tension are possible causes of the problem.

Any advice on what should I do?
Thank you in advance! :)
 
#2 ·
The smudging is caused by lose mesh tension.
When you squeegee the mesh would move due to friction. The emulsion would pick up some ink from the ink on the fabric. The ink on the emulsion would smudge the following fabric that you print on.
Try not to have off contact but make sure your previous print ink is dry. The zero off contact will allow the fabric to grip onto the emulsion which will reduce the image moving. Hope it helps.

Sent from my SM-G900H using Tapatalk
 
#5 ·
For anyone reading this, I had a problem with smudging. I was printing with waterbased ink onto paper, and I figured out what I was doing wrong. I was using acetate for registration, and a few times I forgot to pull back the acetate. The ink built up on the acetate and that's what caused the smudging in my case.