Użytkownik "Adam Wysocki" <g...@s...invalid> napisał w wiadomości
news:otlnb6$ej1$3$gof@news.chmurka.net...
> jacek <j...@w...pl> wrote:
>
>> Wywołuje kretem 7 do 9 gram na 1 litr wody
>> temperatura kąpieli ok 30 stopni, czas wywoływania
>> do 30 sekund.
>
> Kuszące, ale tu:
>
> http://electricstuff.co.uk/pcbs.html
>
> piszą, że:
>
> "The main thing to say here is DO NOT USE SODIUM HYDROXIDE for developing
> photoresist laminates. Use of Sodium hydroxide is the primary reason
> people complain about poor results when trying to photo-etch PCBs."
>
> "It is completely and utterly dreadful stuff for developing PCBs - apart
> from it's causticity, it's very sensitive to both temperature and
> concentration, and made-up solution doesn't last long. Too weak and it
> doesn't develop at all, too strong and it strips all the resist off. It's
> almost impossible to get reliable and consistent results, especially so if
> making PCBs in an environment with large temperature variations (garage,
> shed etc), as is often the case for such messy activities as PCB making."
>
> Więc wolałem jakiś niekretowy wywoływacz :) Przecież one też muszą
> działać...

Przecież kret to 99.9 % wodorotlenek sodu więc o co chodzi.
Kup oryginalny wodorotlenek sodu będzie taniej, i łatwiej dostępny bo
w sklepie za rogiem.