Opportunity is missed by most people because it is dressed in overalls and looks like work. - Thomas Edison
if the m/h unit is home made, what kind of light is it? is it an m/h lamp for security lighting, or shop lighting, or is it an actual m/h bulb for photo exposure. There really is a difference. Just like led lights that have zero uv, and led lights that when configured right, seem to have serious amounts of uv output. We bought a UV meter a few years back and we saw an extreme difference between the uv output of a 1000 watt photosharp, and the 1,000 watt m/h shop lights that were in our ceiling fixtures, and I can tell you that those shop lights would have had a hard time exposing a screen. I could be wrong, you may have the proper lamp set up in your home made unit, but for others, there is a difference between actual lamps.
This home made exposure unit has served me well over the last 3 years... same bulb... perhaps thats the problem?
http://www.sunmastergrowlamps.com.au/pdfs/80310.pdf
Quote from: screenprintguy on August 15, 2013, 10:27:59 PMif the m/h unit is home made, what kind of light is it? is it an m/h lamp for security lighting, or shop lighting, or is it an actual m/h bulb for photo exposure. There really is a difference. Just like led lights that have zero uv, and led lights that when configured right, seem to have serious amounts of uv output. We bought a UV meter a few years back and we saw an extreme difference between the uv output of a 1000 watt photosharp, and the 1,000 watt m/h shop lights that were in our ceiling fixtures, and I can tell you that those shop lights would have had a hard time exposing a screen. I could be wrong, you may have the proper lamp set up in your home made unit, but for others, there is a difference between actual lamps.This is the metal halide im using...This one at least has a good UV spectrum, proper for growing vegetation, which is a lot closer than most shop bulbs out there, probably good for Pure Photo polymers, may have issues with slower curing emulsion like Diazos, you know who would be great to chime in on UV spectrums, Ron Hopkins with M&R/NuArc, he's been in the plate making and emulsion exposing side of everything for a long time, way before M&R took over NuArc, this guy's knowledge of UV is pretty awesome, nice dude too. Just curious, did you create a shutter for your lamp? Just wondering your process of exposing while waiting for a draw down ect. Interesting.http://www.sunmastergrowlamps.com.au/pdfs/80310.pdf
Should really get that mp3140 aye...? Any other better alternatives. Cheers
Quote from: Dochertyscott on August 16, 2013, 06:23:41 PM Should really get that mp3140 aye...? Any other better alternatives. CheersOnly buy a MSP-3140 if you are willing to deal with the issues it will cause.Issues such as:Proper exposureIncreased stencil detailIncreased productionReduced incidents of re-burnsIt's your decision.