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Kepro Sensitized pcb--- Old Stock still good?

2006-06-03 by davelandnni

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

Re: [Homebrew_PCBs] Kepro Sensitized pcb--- Old Stock still good?

2006-06-03 by Leon Heller

----- 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

Re: Kepro Sensitized pcb--- Old Stock still good?

2006-06-03 by Andrew

> 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.

Re: [Homebrew_PCBs] Kepro Sensitized pcb--- Old Stock still good?

2006-06-04 by guja

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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