emulsion

[jason-23]

can i use my standard emulsion SaatiChem Textile PV Red Photopolymer Emulsion for discharge?

[Prosperi-Tees]

You could with a hardener but it still won't last very long. Water resistant diazo is the way to go.

[jason-23]

You could with a hardener but it still won't last very long. Water resistant diazo is the way to go.

does anyone sell a "sample starter kit" like enough to coat a screen or two with some base? I just want to see what the deal is.

[Prosperi-Tees]

I would just contact a local supplier and see if they will give you 'the hook up'.

[StuJohnston]

Midwest has been really good with samples. I can pretty much get a quart of anything, so far as I know, gratis. It has been really helpful, so I would definitely ask about it.

[Gilligan]

You could with a hardener but it still won't last very long. Water resistant diazo is the way to go.

By "won't last" what do you mean?  Some people's definition of "won't last" is like 500 shirts, some it's more than that (though I'm sure yours isn't extremely high... no offense).  But if you are just looking to play around and it would last 200-300 shirts then that might be all one would need.

That would work for me to play around with... but I'd want to do something better for even 100 shirt production run, just because I'm slow like that.

[jason-23]

Yeah this is just for experimentation purposes only so I'll run the emulsion I have and see what happens.

[tonypep]

Often with photopolymers you can't get past a dozen shirts.....if you do you're lucky.

[Prosperi-Tees]

With a hardener I have had a photopolymer last for about 3 dozen shirts. Without a hardener you may get a dozen if you work quickly.

[Gilligan]

Yeah, that's no good.

Jason, check out the "Grand list of emulsions" and see if you can't find something on there to get you by.

[ZooCity]

I'm fixing to go down this road myself and planned on adding diazo to our Aquasol HV.  It has very good water resistance already and diazo + hardener when needed sounds promising.  Almost all of Murakami's photopolymers are rated for discharge- it sounds like photopolymers are a no-go for discharge from other brands but anyone have actual experience with Murakami's and these inks?

Maybe try adding diazo if you are hell bent on staying with one emulsion.  This will change expo values, give it a shelf life once sensitized and give it a little more latitude in addition to adding water resistance.

Myself, I'm not at all opposed to having two emulsions for the different inks as you can choose different colors and have a fool-proof visual of which screens are for which seeing as the coating methods and overall processes are going to be different for each. 

Most suppliers and mfg's are overly generous with emulsion samples it seems, we still have quite a few qt.'s that I never even asked to trial. 

[jason-23]

I'm fixing to go down this road myself and planned on adding diazo to our Aquasol HV.  It has very good water resistance already and diazo + hardener when needed sounds promising.  Almost all of Murakami's photopolymers are rated for discharge- it sounds like photopolymers are a no-go for discharge from other brands but anyone have actual experience with Murakami's and these inks?

Maybe try adding diazo if you are hell bent on staying with one emulsion.  This will change expo values, give it a shelf life once sensitized and give it a little more latitude in addition to adding water resistance.

Myself, I'm not at all opposed to having two emulsions for the different inks as you can choose different colors and have a fool-proof visual of which screens are for which seeing as the coating methods and overall processes are going to be different for each. 

Most suppliers and mfg's are overly generous with emulsion samples it seems, we still have quite a few qt.'s that I never even asked to trial.

Im not hell bent butI just dont want to dump 100 on emulsion that im just playing with, so who can i ask for a sample? i deal with one stroke and tube lite...

[tpitman]

I've bought Ulano's 925WP for printing waterbased. It's cheap. Comes with diazo syrup. Get a quart from Tubelite and you can split it in two if you've got a clean container to get a bit more mileage out of it. Weigh out the syrup and emulsion and only mix half of each. Just get a quart to try out. I don't know how well it holds up to discharge, but it does well with waterbased. Gotta be better than the pure photopolymers. Maybe some one else who has used it with discharge will chime in.
A little slower to expose, but it makes good stencils, and I've had no problem with reclaim. I've given some thought to switching to it exclusively. I usually use Ulano QX-1, which is supposed to have good water resistance if post exposed.

[chubsetc]

I have use chromablue coated 2/2 and post harened in the sun for a couple hour and been able to print 100 2 color fronts and backs ganged on the same 2 screens without a problem. 

[Gilligan]

I have use chromablue coated 2/2 and post harened in the sun for a couple hour and been able to print 100 2 color fronts and backs ganged on the same 2 screens without a problem.

Hmm... I have ChromaBlue and I did a post cure in the sun for a couple of hours and then after printing platisol (or on some screens not even printing) I was able to blow out the emulsion with a VERY cheap pressure washer.

Is that normal?  I've been meaning to mention that but have forgotten.