[ChanceA]

This has happened to me three times now.

I use a homemade dry box with just a small fan blowing into it.

I'm thinking that it is the temp in the room and maybe high humidity.

Anyone else had this happen before?

 

[angippp]

This has happened to me three times now.

I use a homemade dry box with just a small fan blowing into it.

I'm thinking that it is the temp in the room and maybe high humidity.

Anyone else had this happen before?

im no expert but to me that looks like too much emulsion on the screen - ive had that happen when i didnt use a proper scoop and so didnt remove the excess emulsion.

 

[debbbbsy]

When you do your final pull with the coating trough, are you coating or taking off the excess.

Just another thought, noticed that it looks like a brand new screen. Have you degreased it before coating.

Debs

 

[selanac]

I would think it would be too much emulsion. What side of the scoop coater are you using. If using the thick side, are you using that side for a reason? Transfers, etc.?

 

[outbreak]

I'd say too much emulsion. The center where the drips are is much thicker (you can see the orange is darker) than on the edges where the orange is much lighter.

 

[ChanceA]

On this one I did use the rounded side of the coater...thought it would be nice to have a thick stencil.

I tilt the screen back a little at the end to scrape off the emulsion.

This screen is over a year old and I degrease every time I reclaim.

The first time this happened I used the sharp side of the coater.

The only this that seems constant is the temp was in the lower 60's each time...can't check humidity so I don't know about that.

 

[selanac]

I've coated in the 40's. Heater was on, but still cold. If you don't press firmly more emulsion will come out of the coater. Then when you're letting it dry it'll start to drip. Usually it dries on the screen.

 

[mpn]

I had that problem with too much humidity.

 

[jgabby]

What mesh is it ?

Could be due to coarse mesh wit low viscosity emulsion

 

[Omni]

On this one I did use the rounded side of the coater...thought it would be nice to have a thick stencil.

I tilt the screen back a little at the end to scrape off the emulsion.

This screen is over a year old and I degrease every time I reclaim.

The first time this happened I used the sharp side of the coater.

The only this that seems constant is the temp was in the lower 60's each time...can't check humidity so I don't know about that.

It is very nice to have a thicker stencil, and that is where experimentation is important....You can obtain a thicker stencil by doing additional coats after the first coating dries......I do 2 to 4 coatings after drying, depending on my mesh counts and the desired thickness of the final print, along with detail......I use the sharper side of the scoop coater for all my coating, doing multiple thin coats......It requires more time, but the results are fantastic

 

[civil238]

I pretty sure its too much emulsion

 

[sben763]

I can see from the photo Chance is using Ulano orange. It is much thinner then most emulsions and only contains 35-37% solids. In order to make a thick stencil with that emulsion do a 1/1 with the sharp side let dry with shirt side down as usual. After dry add coats to the shirt side with rounded edge then let dry shirt side up.

Emulsion gets thicker the colder it gets. So when its colder your leaving more emulsion. The humidity itself shouldn't cause too much issues unless its too thick on emulsion deposit and its not skinning over fast enough.

 

[ChanceA]

Sean is right it is Ulano orange.
I hated it when I first got it but now I kind of like.

Thanks for the replies. It's probably too much emulsion.

I usually do 1/1 with the sharp side thats probably why it's worked all but three times. It's possible that I used the rounded side before and didn't realize it.

My thinking was If I had a little thicker stencil I could get a one hit white on black. I can get pretty close with what I'm doing now, so a little thicker stencil might get me there.

I will try re-coating when dry and dry it shirt side up on the second coat.

THanks

 

[miktoxic]

sean knows a lot about screen printing so it'd be wise to listen to him.

i coat my screens using a different process. i use a plastic squeegee made for sign vinyl application. i have my screen in a light safe environment. i use the pink diazo emulsion. i actually pur the emulsion on the screen across the width of it and use the squeegee to go up and down until it's coated, pulling the excess off each time i swipe it and pour it back into the emulsion jar. then i do the other side. when i put too much emulsion on the screen the exact same thing happened to me.

 

[Red Leaf]

I'll just add my agreement with everyone else. To much emulsion. If you want a thicker stencil just let the first coats dry and then add a second coat on the shirt side only.