Blocking UV light
Blocking UV light
You guys might want to try switching out the blue with an amber UV shield material.
http://jtechphotonics.com/?product=445n ... -shielding" onclick="window.open(this.href);return false;
I ordered some for my l-cheapo uv laser cutter mod (2 watts)
http://jtechphotonics.com/?product=445n ... -shielding" onclick="window.open(this.href);return false;
I ordered some for my l-cheapo uv laser cutter mod (2 watts)
Re: Blocking UV light
I feel that site is unnecessarily expensive for what you're getting in return. Does anyone know of an alternative?
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- ULTIMATE 3D JEDI
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Re: Blocking UV light
In the video interview that John and Steve did for some 3d printing blog, the subject of the blue window came up. They said something to the effect that it blocked UV.
R-Max V2
Eris
Folger Tech FT-5 R2
Eris
Folger Tech FT-5 R2
Re: Blocking UV light
unless you are printing outside in the sun, I've been printing every day with the cabinet open actually, working fine... what you dont want to do is leave the resin in the dish longer than you are going to use the machine. we've left a dish of resin out under the room lights for a few days without it curing from that (tho the pigment does does seperate whcih is why you pour back what you dont use into the tub after use, and shake well before use and fill up the vat.
Guanu
Guanu
Re: Blocking UV light
If it's going to be a UV DLP kit, IMO it should follow some "best practices" so it's robust (one of them being using UV blocking acrylic). It's not so much an issue printing inside, but if a person takes this to a makerfaire and prints outside or is printing someplace lit by mercury vapor bulbs, they're going to have a bad time.
I've mentioned this to John and Guanu before, but I digress... :p
I've mentioned this to John and Guanu before, but I digress... :p
Re: Blocking UV light
Where else would you purchase UV blocking acrylic, sgraber? I'm considering blocking it out entirely with a piece of wood.sgraber wrote:If it's going to be a UV DLP kit, IMO it should follow some "best practices" so it's robust (one of them being using UV blocking acrylic). It's not so much an issue printing inside, but if a person takes this to a makerfaire and prints outside or is printing someplace lit by mercury vapor bulbs, they're going to have a bad time.
I've mentioned this to John and Guanu before, but I digress... :p
Re: Blocking UV light
I know Ponoko has it.
Also, I hope I don't come across negative with my comments, so I apologize if I do or did. That said, I do have a significant background in formulating UV resins for different applications (see my LinkedIn profile: https://www.linkedin.com/in/sgraber?_mSplash=1" onclick="window.open(this.href);return false; ) so I do have a lot of experience when it comes to resin requirements and things to watch for when designing UV systems, the acrylic being one of them. To be completely transparent: I am working for MakerJuice formulating UV resins.
A couple of solutions to the blue are:
* use an acrylic with UV blockers (I believe they can be sourced in a number of colors)
* put a transparent piece of polycarbonate behind it
* use a UV absorbing film behind the blue
Shane
Also, I hope I don't come across negative with my comments, so I apologize if I do or did. That said, I do have a significant background in formulating UV resins for different applications (see my LinkedIn profile: https://www.linkedin.com/in/sgraber?_mSplash=1" onclick="window.open(this.href);return false; ) so I do have a lot of experience when it comes to resin requirements and things to watch for when designing UV systems, the acrylic being one of them. To be completely transparent: I am working for MakerJuice formulating UV resins.
A couple of solutions to the blue are:
* use an acrylic with UV blockers (I believe they can be sourced in a number of colors)
* put a transparent piece of polycarbonate behind it
* use a UV absorbing film behind the blue
Shane
Re: Blocking UV light
I know of your background and highly respect your advice, Shane. Would there big a large difference between using UV film opposed to using transparent polycarb? I've never heard of the film before and that would let me keep the blue color as well.sgraber wrote:I know Ponoko has it.
Also, I hope I don't come across negative with my comments, so I apologize if I do or did. That said, I do have a significant background in formulating UV resins for different applications (see my LinkedIn profile: https://www.linkedin.com/in/sgraber?_mSplash=1" onclick="window.open(this.href);return false; ) so I do have a lot of experience when it comes to resin requirements and things to watch for when designing UV systems, the acrylic being one of them. To be completely transparent: I am working for MakerJuice formulating UV resins.
A couple of solutions to the blue are:
* use an acrylic with UV blockers (I believe they can be sourced in a number of colors)
* put a transparent piece of polycarbonate behind it
* use a UV absorbing film behind the blue
Shane
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- ULTIMATE 3D JEDI
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- Joined: Sun May 11, 2014 6:18 pm
Re: Blocking UV light
A clear piece of polycarbonate (Lexan) would probably be easier to source.
R-Max V2
Eris
Folger Tech FT-5 R2
Eris
Folger Tech FT-5 R2
Re: Blocking UV light
I just did a quick test on the blue acrylic. At best it filters 50% of the UV that hits it. Orange or amber without UV blockers filter almost 90%, based on my data.
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- ULTIMATE 3D JEDI
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