Darkroom.........................

RobertWBarnes · January 18th, 2012, 03:14 PM

Quote:

Originally Posted by Binkspot

Just for the record I coat all my screens in the shop with the lights on, not in the darkroom. I also bring all the screens out for a job when I'm regestering them on my bible board. By the time I set them up and burn them some have been out of the dark for 10-15 min. Like mentioned above a few min out of the dark room is nothing compared to a few min of high intensity uv from the exposure unit.

As for cleanliness, sure you want things to be neat and clean but we are not building microchips or satellites.

It's not like it's magic emulsion that cures instantly when exposed to light. Besides there are no uv proof lights, even the best emit some uv energy

As for the heat I use it to accelerate the drying of reclaimed screens, fresh emulsion and ones we just exposed. It also helps keep the room dry and the humidifier won't need to work as hard. FYI I do have a filter to keep dust out of the dry box.

Good points made ... Preston posted this in response to the heat -vs- Moisture issue ...

Heat -vs- Moisture ...

interesting science ... but what do we know we are just a bunch of guys behind keyboards ;-) LOL

Gilligan · January 18th, 2012, 09:10 PM

I'd also argue that your "1 to 2 light units" are highly exaggerated in typical shop lights.

People have left a quarter on their screen sitting under clear uv tube protected bulbs for hours and it washed out. Under yellow tubes it went days. under standard unsleeved tubes I'm sure are a FRACTION of a light unit when exposed for the time.

You can talk about the good ol days but hey, "the good ol days weren't all that much better" - Extreme... besides... back in the day you had to crank start your car... do you still think we should stay in the habit of cranking our car because that is the way it was done back then?

Times change... keep up.

stefanick · January 18th, 2012, 10:29 PM

Quote:

Originally Posted by srimonogramming

If my post confused them then they don't have much hope in this industry, or life in general. I told them to put the screen in safe light quickly after coating, so what's the problem with my statement?

easy fellas, its only screen printing..i do the same .coat in the light and then put them in the dry cabinet, then take them out in the light, expose them and walk them to the washout booth in the light and have zero problems. I think robert meant FUNDAMENTALLY this is the correct way to do it,

Gilligan · January 18th, 2012, 10:50 PM

I'd agree with that... but if you get someone that doesn't know what they are doing that will be more confusing.

They will be trying so hard to not expose their screen to ANY light that they will make things way more difficult on themselves than they should.

I'm probably guilty of that. I probably take WAY too many steps to protect my screens from any smidgen of light. That equals wasted time, which equals wasted money.

Icon_714 · January 18th, 2012, 10:59 PM

Barnes getting technical with printing and pre press is always lol worthy.

RobertWBarnes · January 19th, 2012, 12:06 AM

Why do it half azz ... I can't wait to show of the FPU (film positioning unit) for the Mustang -and- when you girls see the screen jig mount on the press you'll scream with excitment like school girls in a high school lunch room :-)

Icon_714 · January 19th, 2012, 01:21 AM

Quote:

Originally Posted by RobertWBarnes

Why do it half azz ... I can't wait to show of the FPU (film positioning unit) for the Mustang -and- when you girls see the screen jig mount on the press you'll scream with excitment like school girls in a high school lunch room :-)

probably not.

GraphicDisorder · January 19th, 2012, 07:21 AM

I had to come lol about this thread again. LOL

RobertWBarnes · January 19th, 2012, 07:41 AM

One of the things I thought about while driving ... if you have older technology and believe in older technology -then- why try to improve ... just stick with the older technology that you are comfortable with -and- the old school thinking of that's the way we have always done it -and- it works for us ;-) LOL

Now we know why Bill Hood never gets along on these forums :-o

Binkspot · January 19th, 2012, 09:08 AM

Forgive me Father for I have sinned. It has been 1 year since my last confession. I have committed this sin against myself and the screen printing industry.

This morning I removed a screen from the darkroom and exposed it to ambient light for 1 minuet while registering it on my bible board before putting it in the exposure unit. I also let it sit in the exposure unit for ten minuets post exposure while I was talking on the phone with a customer. But thanks to powers that I do not fully understand the image washed out easily using only the garden hose nozzle.

Please accept my apologies in advance to anyone who I might have offended with this post, and understand my sarcasm.