Homebrew PCBs

roel_cnc wrote:
> --- In Homebrew_PCBs@yahoogroups.com, "Ben H. Lanmon" <bhleavi@y...> 
> wrote:
> 
>>>Went to the M.G. Chemicals website
>>>
>>>They list the wavelength at 375nm
>>
>>Sylvania website listed the Blacklite as having a peak output at 
>> 356nm
> 
> 
> 
> TL-40/05-from PHILIPS i use workz great older series 
> Actinic Lamp
> color/05
> nm:300-460 uvb type is used in many major brands like welisch rapid
> 
> now these days dey run under the type/name "cleo"
> 
> bit more info
> http://www.eur.lighting.philips.com/int_en/oem/ca/special/segments/bod
> ycare/natural.html
>  
>  gr Roel
> 

Yes, a sun tanning lamp may be great source for photoresist exposure.
Not sure if anyone seen this page on spectral sensitivity of typical 
photoresists.

http://www.circuitree.com/CDA/ArticleInformation/features/BNP__Features__Item/0,2133,3647,00.html

To summarize, the photoresists have a usable spectral sensitivity in the 
range 340nm to 400nm, where peak is around 360 nm.

One thing no one has talked about is what people use for a safe lighting. I 
colored a couple of fluorescent tubes with some yellow water based acrylic 
paint.