Hi ,The picture of the lamp in the instructions looks like a sunlamp (UV)
type of lamp by the shape. There is no description as to what the film is
sensitive to, every resist I have seen used over the last 30 years has been
UV sensitive.
Don VK3YV
type of lamp by the shape. There is no description as to what the film is
sensitive to, every resist I have seen used over the last 30 years has been
UV sensitive.
Don VK3YV
----- Original Message -----
From: "pixelcanvas" <pixelcanvas@...>
To: <Homebrew_PCBs@yahoogroups.com>
Sent: Saturday, October 11, 2008 12:50 PM
Subject: [Homebrew_PCBs] Re: Dry film woes, maybe the developer is at fault?
> --- In Homebrew_PCBs@yahoogroups.com, "warrenbrayshaw"
> <warrenbrayshaw@...> wrote:
>>
>> "pixelcanvas" wrote:
>> >
>>
>> > The stuff I'm testing is this:
>> > http://www.es.co.th/Detail_eng.asp?Prod=WARA%2DDRYFILM
>> >
>> > I get it locally (I live in Bangkok), and unfortunately the
>> > instructions are in Thai... my girlfriend helped me out with it but I
>> > still think there may be something wrong with them...
>> >
>>
>> As this appears to be Wara product try the manufacturers web site to
>> confirm your translation was correct.
>>
>> http://www.warapcb.com/dryfilm.php
>>
>> All the best
>
> Yes, the translation is correct, but I have serious dubts about it's
> usefulness. For example it does say to use a 100W light bulb for 15
> minutes to expose the film, and I know for a fact that is way too
> little time. So I think I should take those instructions with a pretty
> large grain of salt...
>
> Harvey, I think what you are saying about the bottom of the film not
> being exposed may be correct.
> I'm going to try to get an UV light, and expose a test board at
> different times, I'll place a piece of cardboard over it and move it
> to the side every 15 minutes or so to expose more of the board. Then
> I'll see what exposure time works best.
>
> Thanks lot for the suggestions so far.
>> Warren
>>
>
>
>
> ------------------------------------
>
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>
>
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