[builtfromlegos]

Pretty sure we totally blew it but just in case,

My friend and I have printed for a while, but with our old professor in his studio and have never dealt with emulsion aside from coating.

We bought a QT of Ryonet WBP Hybrid Emulsion with a Dual Cure Diazo, We distilled water by heating it, then added it to the diazo, still pretty warm/hot. 2nd screw up, we began to mix it into the emulsion in our kitchen for about 10 seconds before realizing and rushing to a light safe area. We let it "cure" and it coats fine, but doesn't seem to be light sensitive; no prints.

Can we add another helping of Diazo (correctly this time)? or is it all ruined?

thanks

 

[tlpe548b]

ya it's done. If you have already exposed the emulsion to light you are sol.

 

[Prof Yaffel]

1) you don't need to use distilled water, tap water is fine....warm is ok but hot is not. diazo is destroyed by heat

2) You can mix Ok in white light ( but not by a window ); artificial lighting doesn't give out much UV, but don't leave it open to the light ofr extended periods. Coated screens should only be used in safe light .

 

[ScreenFoo]

Tap water would be better than hot distilled water, for sure. Of course, a bottle of distilled water is a heck of a lot cheaper than a qt of emulsion here...

It's advisable to check your stirring job under fluorescent lights--safe lights are usually not good enough to see if you've fully mixed diazo in. Even in a room with windows, it's unlikely you would fully screw up a whole tub of emulsion, unless you sat there stirring it for minutes in direct sun. It could be much less effective, however.

I have never done this, but I would guess that if you did prematurely activate the diazo with water that was too hot, more fresh diazo properly mixed would activate it, but I have never tried it. Perhaps someone who has tried it will chime in.

 

[mimic]

i mix mine under flourecents and coat. i havnt had any problems.

dunno about the heat thing, but i would check that you screens are absolutely light proof while drying before buying another quart.

if you have a drying box throw a thick blanket on top.

 

[selanac]

You said you didn't get an image. What kind of exposure unit do you have.

Also, look for a local Screen Printing Supplier in your area, and buy a Pre-mixed Emulsion. It last for about a year. In door lights are okay, but not Sun Light as everyone one mentioned.

Also, if you leave an unexposed screen or emulsion to indoor lighting over night or longer you'd probably ruin it.