Homebrew PCBs

I just found a sealed bag of Kepro sensitized boards.  Might be 5-10 
years old. Stored in air conditioned area.

Will they still work?   

Cat#522-465G
4"X6"X 0.62" G10 2Oz 2 sides sensitized

Are these positive or negative?
What developer does this use?  


Thanks
Dave

----- Original Message ----- 

From: "davelandnni" <daveland@...>
To: <Homebrew_PCBs@yahoogroups.com>
Sent: Saturday, June 03, 2006 6:19 PM
Subject: [Homebrew_PCBs] Kepro Sensitized pcb--- Old Stock still good?


>I just found a sealed bag of Kepro sensitized boards.  Might be 5-10
> years old. Stored in air conditioned area.
>
> Will they still work?
>
> Cat#522-465G
> 4"X6"X 0.62" G10 2Oz 2 sides sensitized
>
> Are these positive or negative?
> What developer does this use?

Sensitised boards don't usually work properly after about six months, I've 
found.

Leon

> davel wrote::
>
> I just found a sealed bag of Kepro sensitized
> boards.  Might be 5-10 years old. Stored in
> air conditioned area.
> 
> Will they still work?   

Dont know about Keppro - but Kinsten boards will
go a bit blotchy and loose contrast after 1 or 2
years. (my boards are kept in a fridge)

I have use board that are 3 or 4 years old but
the results where average.  The amount of exposure
time needed was 3 times higher than fresh boards
and large black/copper areas didnt hold up at all
well.

I think you need a VERY high contrast phototool
to make up for the lack of contrast of the board.


> Cat#522-465G
> 4"X6"X 0.62" G10 2Oz 2 sides sensitized
> 
> Are these positive or negative?
> What developer does this use?  

Sorry cant help you there.

Kepro>>>Dalpro :
   
  http://www.dalpro.net/about.html
   
  your boards are coated with dry film negative resist:
   
  http://www.dalpro.net/HOWTO.html
  
:) 
  
davelandnni <daveland@...> wrote:
  I just found a sealed bag of Kepro sensitized boards.  Might be 5-10 
years old. Stored in air conditioned area.

Will they still work?   

Cat#522-465G
4"X6"X 0.62" G10 2Oz 2 sides sensitized

Are these positive or negative?
What developer does this use?  

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