LED from SAATI.

[abchung]

450W is equivalent to 3.5K to 5K
amazing

They also discuss wavelengths.

Watch from 4:30 onward.
https://www.youtube.com/watch?v=qUyxjFGRKH8

[jvanick]

I played with one of their 300W lights today... exposing PHU2 at 30 seconds.

however, no glass or vacuum, in our testing it was just the light.

-J

[BorisB]

I googled "450W LED Saati", got no useful results.. Was it me, or it's well hidden secret?

[Wildcard]

I would also be interested in getting hold of one of these lamps. I contacted them through their website and got no response.

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[blue moon]

we've been using the 300W unit for about 3 months now. With Aquasol HV it's about 60 seconds (through the glass) to expose. The sad part is, we've had the 450W unit sitting here for almost 6 months and have not had a chance to play with it!

pierre

[TCT]

Jvanick- you use it at all with SP-1400?

[Sbrem]

Well get on it Pierre, I have a lot of interest in this . What's the price neighborhood for the 450?


Steve

[jvanick]

Jvanick- you use it at all with SP-1400?

honestly I have not tried...  I do have a quart here, I suppose I could mix it up and shoot some screens with it.

My guess is that it won't work very well as it's a 405nm light source and Diazo likes it's wavelength lower in the 360nm range, since my Sp1400 times on the starlight were around 2min for a complete cure, so I'm thinking that it would even be even longer (3-4 min exposure time if I try it) and possibly not fully crosslink.

I'll give it a shot tho and report back.

Saati is telling me that I should be using their light as my post-cure source, AFTER doing initial cure on the Starlight, but I'm pushing the envelope just to see what happens....

[Sbrem]

Jvanick- you use it at all with SP-1400?

honestly I have not tried...  I do have a quart here, I suppose I could mix it up and shoot some screens with it.

My guess is that it won't work very well as it's a 405nm light source and Diazo likes it's wavelength lower in the 360nm range, since my Sp1400 times on the starlight were around 2min for a complete cure, so I'm thinking that it would even be even longer (3-4 min exposure time if I try it) and possibly not fully crosslink.

I'll give it a shot tho and report back.

Saati is telling me that I should be using their light as my post-cure source, AFTER doing initial cure on the Starlight, but I'm pushing the envelope just to see what happens....

My question about the LED wavelength issues is this: are the LED dead focused on their rated wavelengths, as in, a 405 nm puts out ONLY 405 nm? Or do they actually have a wider spectrum, but are peaking at their rate wavelengths, as in, a 405 nm will require a longer exposure time to expose an emulsion that prefers, say, 365 nm? After all, our MH exposes everything we've ever used; it's just that each new emulsion would have new exposure tests to find the optimal times for each mesh we use. That being said, if a 405 nm is not as fast with a diazo as with a dual cure , but is 5 times faster than my 5K MH is with a diazo, do I really care that much about that?

Steve

[blue moon]

Well get on it Pierre, I have a lot of interest in this . What's the price neighborhood for the 450?


Steve

no clue on the price, my guess would be $3K?!? you'll have to ask them. It is available for sale already . . .

My guess is we'll start testing it next month as we slow down a bit. We are fully booked for this month.

pierre

[jvanick]

My question about the LED wavelength issues is this: are the LED dead focused on their rated wavelengths, as in, a 405 nm puts out ONLY 405 nm? Or do they actually have a wider spectrum, but are peaking at their rate wavelengths, as in, a 405 nm will require a longer exposure time to expose an emulsion that prefers, say, 365 nm?

as has been explained to me, LEDs put out a very narrow wavelength, a 405nm diode might put out 400-410nm, but very little on either side of that.  At least one LED unit (Lightspeed) is multi-spectrum, and I believe they hold the patent on that configuration.

a emulsion that prefers 365nm may not cure fully with a 405nm light source, just as a emulsion that prefers 405nm may not cure fully at 365nm, but not having the light source 'tuned' to the emulsion sensitivity will definitely result in a longer exposure time.

[blue moon]

Jvanick- you use it at all with SP-1400?

honestly I have not tried...  I do have a quart here, I suppose I could mix it up and shoot some screens with it.

My guess is that it won't work very well as it's a 405nm light source and Diazo likes it's wavelength lower in the 360nm range, since my Sp1400 times on the starlight were around 2min for a complete cure, so I'm thinking that it would even be even longer (3-4 min exposure time if I try it) and possibly not fully crosslink.

I'll give it a shot tho and report back.

Saati is telling me that I should be using their light as my post-cure source, AFTER doing initial cure on the Starlight, but I'm pushing the envelope just to see what happens....

My question about the LED wavelength issues is this: are the LED dead focused on their rated wavelengths, as in, a 405 nm puts out ONLY 405 nm? Or do they actually have a wider spectrum, but are peaking at their rate wavelengths, as in, a 405 nm will require a longer exposure time to expose an emulsion that prefers, say, 365 nm? After all, our MH exposes everything we've ever used; it's just that each new emulsion would have new exposure tests to find the optimal times for each mesh we use. That being said, if a 405 nm is not as fast with a diazo as with a dual cure , but is 5 times faster than my 5K MH is with a diazo, do I really care that much about that?

Steve

this rabbit hole is actually quite a bit deeper than it seems.
-no light emits only one wavelength, the only question is how strong is the other stuff. My guess is that with the LEDs the rated wavelength will be at the top of the bell curve. How wide is the curve and how flat is the top might be worth thinking about.
-the other issue is that the frequency that has the most power to crosslink is not the frequency that will penetrate  the best. Do you go for more penetration and deeper crosslink or do you go for strongest stencil?


pierre

[Dottonedan]

I would also be interested in getting hold of one of these lamps. I contacted them through their website and got no response.

Sent from my SM-P555 using Tapatalk

Are you looking for a person or an auto response, to me, auto responds are useless and today is Sat, so I don't expect a response on the weekend. General business hours to me would be Mon -Fri 8-5. Anything outside that is a bonus. It's common tho for people to check their emails over the weekend randomly and may get back to you on Monday.

[Dottonedan]

we've been using the 300W unit for about 3 months now. With Aquasol HV it's about 60 seconds (through the glass) to expose. The sad part is, we've had the 450W unit sitting here for almost 6 months and have not had a chance to play with it!

pierre

Be careful, it you don't use it, you can lose it and never know for yourself.

[Wildcard]

I would also be interested in getting hold of one of these lamps. I contacted them through their website and got no response.

Sent from my SM-P555 using Tapatalk

Are you looking for a person or an auto response, to me, auto responds are useless and today is Sat, so I don't expect a response on the weekend. General business hours to me would be Mon -Fri 8-5. Anything outside that is a bonus. It's common tho for people to check their emails over the weekend randomly and may get back to you on Monday.

Oh, I sent that request a few months back when the Saati led topic came up in another thread. I didn't even notice they hadn't replied until this topic reminded me.
I have had total brain fry lately at work.

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