Clear haze in screens? See pic.

[Frog]

I do have to say that, though a problem in some areas, I'm sure,  I have never seen the minerals in any particular water leave the rainbow sheen that is the characteristic visual of scum.Minerals leave more of an actual powder-like residue, don't they?

I was just about to post that. Yeah, more of a crust on the screen with minerals. I'm surprised you haven't seen it, we have.
Are you CCWD or EBMUD?

Walnut Creek is EDMUD, while Pleasant Hill and Concord are Contra Costa water. That made a big difference with fish too. My pH right out of the tap was real close to what we wanted.


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[Frog]

On the other hand, our water is A little soft to be perfect for beer.


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[Admiral]

On the other hand, our water is A little soft to be perfect for beer.


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Easily fixed with some gypsum 

[ebscreen]

I couldn't recall the boundaries, I have a buddy that works for mud, he's described where one
pipe stops and the other begins. He's also described lead pipes and eternal leaks under roads.

I'd take mud any day having lived under both.

Dark beers are fine with soft water, and if you can see through it, it isn't beer anyways.

[Frog]

On the other hand, our water is A little soft to be perfect for beer.


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Easily fixed with some gypsum 

Yep, a standard fix. Loosens up soil too I believe


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[Underbase37]

Another vote for underexposed.

Murphy

[mk162]

Another vote for more beer talk.

[Dottonedan]

I'm now pretty sure it's the exposure unit it'self.  It's the flo bulbs in a NuArc First Light. We are coating 2:1 (round) using SAATI emulsion.

I'm told we are getting a solid 7 in the stouffer's step test. If that is the case, then I still think we are a little under...and just enough to leave this residual behind.


Alan Howe came by the other day and will be sending me some samples of other emulsion they sell that might be a good fit for us. What we have right now, is not (as good) for halftone work. We haven't tested all mesh on the exp test yet...and I wasn't around to be there when they did test, so I don't know for sure how accurate the initial test were.

[Stinkhorn Press]

I'm now pretty sure it's the exposure unit it'self.  It's the flo bulbs in a NuArc First Light. We are coating 2:1 (round) using SAATI emulsion.

I'm told we are getting a solid 7 in the stouffer's step test. If that is the case, then I still think we are a little under...and just enough to leave this residual behind.


Alan Howe came by the other day and will be sending me some samples of other emulsion they sell that might be a good fit for us. What we have right now, is not (as good) for halftone work. We haven't tested all mesh on the exp test yet...and I wasn't around to be there when they did test, so I don't know for sure how accurate the initial test were.

solid 7 is a good plan, but it's not a perfect system. depends quite a bit on soak time, washout time, speed, pressure, human. and if you aren't burning all the way through (you aren't) that 7 might be reading from the light-source side of the emulsion only...

which emulsion? flo tubes and 2:1 round is probably a bad combination for all but the easiest to expose emulsions out there, my guess.
is reclaim difficult? is the image left on the screen after reclaim with any consistency?

[Maxie]

I had this with diazo emulsions for a long time.     We were underexposing.       We solved the problem by blowing the water off with air before drying.
I now use Saati PHU and a Saati led, great screens, 7 on the scale and nothing like this.