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[AMPS] Making PC boards/Silkscreen

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Subject: [AMPS] Making PC boards/Silkscreen
From: (
Date: Fri, 6 Jul 2001 23:38:02 EDT
In a message dated 7/6/01 2:58:25 AM Eastern Daylight Time, writes:

>  I will tell you that the ferric chloride method is something that you will 
> throw rocks at when you learn about the etchant that I use.  It has a 
> of requirements that must be strictly adherred to and other than that it is 
> superior to any methods that I have come across:
>  It must be well ventilated!!!!!!!!!!!!!!!!!!!!!!!
>  It must not get too hot!!!!!!!!!!!!!!!!!!!!!!!!!!
>  The following solution requires NO heating, NO bubbling, No agitation!
>  1-part H2O2 (Hydrogen Peroxide)
>  1-part Muratic acid (Hydrochloric Acid)
>  8-parts H2O (water)
>  The boards are suspended in the solution and the reaction causes a 
> thermogenic reaction and heats the solution.  It must not get above 155 F 
> it will boil out of the etching tank--even if it is tall.  Adding a cup of 
> Amonium Hydroxide will raise the danger point to about 187 F which is 
> to work with.  
>  =======================================================

Thank you for your most informative post.

Would you please tell me what material the etching solution container is made 

Regards & 73 de

Dave, WT8R

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