Next time, do a little test piece first.....

If you use Sodium Hydroxide developer, DON'T.
Sodium Metasilicate developer is miles better, having a huge margin =
between 'develop' and 'strip',
minimal temperature depenency and infinite shelflife of made-up solution.=
=20
more info at www.electricstuff.co.uk/pcbs.html

On Wed, 18 Aug 2004 17:48:56 EDT, you wrote:

>In a message dated 8/18/2004 5:42:46 PM Eastern Daylight Time,
>techsupport@FALCONWIRELESS.NET writes:
>
>I just  blew $50.00, a 12"x18" board after exposing using 2 #2 =
photofloods
>20"  above the board exposed for 30 minutes. I got a good "image pop-up"=
 when
>I  placed the board in the developer tray, then the entire emulsion  =
floated
>away.
>Anyone else ever have this happen? the Litho had excellent  contrast, =
dark
>areas completely block sunlight.
>The only 2 things I can  think of is 1 my D3P concentrate has gone sour,=
 or 2
>the board being warm  to the touch had the emulsion softened by heat and=
 was
>washed away after 30  sec in the developer.
>I want to figure out what went wrong with the first  board before trying
>another @ $50.00 per attempt.
>
>KF4HAZ -  Lonnie
>
>
>
>The one thing I don't see mentioned is whether the board was  =
pre-sensitized
>or not.  If it wasn't pre-sensitized then how well and what  method did =
you
>use to clean it?
>
>
>Randy  Abernathy
>4626 Old Stilesboro Road NW
>Acworth, GA 30101-4066
>Phone /  Fax: 770-974-5295
>Cell: 678-772-4113
>E-mail: Cnc002@aol.com
>
>I  furnish technical support, repair, and other related services for =
your
>industrial woodworking machinery. My background as Senior Service =
Engineer for
>the SCMI Group for nearly fifteen years with factory training, combines =
with
>my  extensive background in electronics, mechanics, pneumatics, =
electrical and
>CNC  machinery to offer you needed support for your  machinery.

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