discharge bases, plastisol highlights

[ericheartsu]

We are having the hardest time getting this to work.

We just printed a job that had pretty heavy plastisol highlights, with a discharge base. We set it up as follows:

1. Discharge base 160
2. light pink-272
3. empty
4. roller
5. hot pink-272
6.magenta-272
7.empty
8. flash-272
9.orange-272
10. highlight white-230


The discharge base was a big blocky image, printed through a 160. tripple durometer squeegee. All the highlights were on 272 screens, and every single color was picking up.

So tried flashing the base, after color number 2, and putting the roller on, so that it flatten it. This worked for a while, but we were adhesiving every round. and it was still picking up, even with the flashed second color.

What can i do so that it doesn't pick up? Normally in our base we put 80clear/20 white. This time our ink girl decided to do 95 clear/5 white, which didn't work like she wanted to, (not to mention i told her not to do that).

any ideas?

[JBLUE]

We use 0 white. Base only. I am not a fan of adding white but that is just preference. Flash the base to keep it from wetting the backs of the other screens and print it like a light shirt. 160 is too low in my opinion. Try a 195 or even higher. We run a lot at 195-230 without a hitch. You only need to discharge the top layer of the shirt when plastisol goes over the top.

[ebscreen]

Less white in the base is always better if you can still achieve the top colors you want. I'd imagine
with a hot pink you'll probably need some amount of white.

Couple things. Make sure you aren't getting too much penetration. This will cause adhesive issues.
I'd up that base mesh.

Imagine you're only printing the plastisol colors on a white shirt. Would you have pickup
problems then? Set it up like you are printing on lights, which printing on a discharge
underbase basically is.

Lastly, we've found that you have to keep moving, and don't let the screens
sit for too long. Not due to dry in, but more of a factor that the little bit of discharge on the bottoms of subsequent
screens if it starts to dry and get kind of tacky will pick up more and then you hate life.
So get your print dialed in and go to it and don't stop for too long.


 

[ericheartsu]

i think the base was 100% penetrating to much.

Usually i don't think the clear base by itself presents a very good base. These were printed on royal, black, and purple. The purple and black looked fine, but the Royal need to be adjusted for sure. the white just doesn't sit right.

[JBLUE]

I have posted these up before and will again because I just have not taken to many pics lately. Both discharge base only. 230 S mesh only. No white in the base. Plastisol on top. The first is a spot job and the second is an index. Both bases were flashed. Especially the Rudder Room just for that stickiness issue on the screen following the base. The top print was all 230's and the index was all 305's on the top colors. Blues and yellows are bright and vibrant.