Archive of the former Yahoo!Groups mailing list: Homebrew PCBs

previous by date index next by date
previous in topic topic list next in topic

Subject: Re: [Homebrew_PCBs] Re: UV Light Box Bulbs

From: Rajendra Jain <r.k.jain.or@...>
Date: 2012-01-22

Source for HID mercury lamps.
http://www.1000bulbs.com/category/mercury-vapor-lamps/


On Thu, Jan 19, 2012 at 10:54 PM, Jeff <jeff.heiss@...> wrote:

> ∗∗
>
>
> I see that some here are using for mask/photoresist exposure. Where can
> HID mercury lamps be obtained? Do they give better results than black
> lights or the yellow-housing halogen work lights found in home centers?
>
> Jeff
>
> --- In Homebrew_PCBs@yahoogroups.com, "Zoran A. Scepanovic" <zasto@...>
> wrote:
> >
> > Zdravo kirilian2351,
> >
> > Sunday, February 8, 2004, 12:55:43 AM, ti rece:
> >
> > k> I am wanting to build a UV light box. I have read as many internet
> > k> articles as I could find on the subject. Some articles will
> > k> recommend certain bulbs while other articles will say to stay away
> > k> from those that were recommended. What is the best bulb to use that
> > k> is easily obtainable? I have read an article that suggested using
> > k> bug zapper bulbs. My local Home Depot carries 15W and 40W versions
> > k> of the replacement bulbs for the Zapper models. Would this type of
> > k> bulb work? I have also read about breaking the glass shell of a
> > k> mercury vapor bulb and using the internal tube as a UV source. I
> > k> don't plan to make large circuit boards (no larger than 6" square).
> >
> > DO NOT break the outer glass shell of a mercury vapour lamp! It will
> radiate a lot of short wave UV (UV-A) which is dangerous for eyes and skin,
> and it generates lot of ozone (O3). Good results could be obtained without
> breaking the outer glass shell.
> >
> > I'm currently using 2 PHILIPS TL 20W/09N, and the exposure time from
> cca. 20cm is 5 minutes.
> >
> > For determination of the correct exposure time I can suggest the 21
> wedge stouffer gage (http://stouffer.net).
> >
> > --
> > Sincerely,
> > ����``````````````````````````````````````````````````````����
> > ZAS ElMed | mailto:zasto@...
> > szr za proizvodnju i odrzavanje | http://www.zas-elmed.co.yu
> > medicinske i industrijske |
> > elektronike i automatike | Tel/Fax: (011) 344-0748
> > |
> > Zoran A. Scepanovic | Mob: (063) 609-993
> > ���,����������������������������������������,�������������,���
> >
> > ∗∗∗∗∗∗∗∗∗
> > "Programmers don't die! They just GOSUB without RETURN."
> > ∗∗∗∗∗∗∗∗∗
> >
> > [Non-text portions of this message have been removed]
> >
>
>
>



--
Imagine no possessions
I wonder if you can
No need for greed or hunger
A brotherhood of man
Imagine all the people
Sharing all the world ... John Lennon


[Non-text portions of this message have been removed]