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Very Easy Photo Etching Method - Page 2

post #16 of 19
10/25/10 at 11:53am
Quote:
Originally Posted by Avro_Arrow View Post

How long was it after you took the protective plastic off the board before you exposed it?


There was no protective plastic on the board. It was just in black bag. I cut it and then applied UV (around 30s).

 

Quote:
Originally Posted by Avro_Arrow View Post

How long after you exposed it before you developed it?

 

I started developing it immediately.
 

Quote:
Originally Posted by Avro_Arrow View Post

Did you mix the developer properly? Mine is mixed 10 to 1 with water.


10:1 didn't work for me. I even tried to mix one small drop of NaOH with 50ml water. The same effect. Strange.

 

BTW My NaOH looked like water. Your is green.


Edited by akgfan - 10/25/10 at 11:58am
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post #17 of 19
10/25/10 at 1:50pm
Thread Starter 


Sounds like maybe you had a bad board.

My boards come with a white plastic coating that

you have to peal off before use. But that may

be specific to my brand of boards, i haven't

tried any others. I don't know what supplies

are available to you, I'm sure they are different

to what I can get here.

 

My SH is green due to use. It is clear when new.

It might be worth your while to try again and post

your progress so we can troubleshoot it.

 

Quote:
Originally Posted by akgfan View Post


There was no protective plastic on the board. It was just in black bag. I cut it and then applied UV (around 30s).

 

 

I started developing it immediately.
 


10:1 didn't work for me. I even tried to mix one small drop of NaOH with 50ml water. The same effect. Strange.

 

BTW My NaOH looked like water. Your is green.

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post #18 of 19
5/14/11 at 9:26am
Thread Starter 


I think I know what you may have done wrong.

I found out the hard way that if your solution is too hot

it will take everything off the board in about five seconds...

 

 

Quote:
Originally Posted by akgfan View Post

I tried that a few years ago and every time a put my pcb into developer my photosensitive film was completely away. Don't know what I did wrong.



 

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post #19 of 19
5/17/11 at 1:51pm

It wasn't hot but normal room temperature. I'm stuck with hand drawing, but I kind of like it because it's fun.

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