homemade photo resist developer?

[fatfoohy]

I've found this linkhttp://hackedgadgets.com/2006/06/24/photo-etch-circuit-board-process/4/, but also read that sodium bicarbonate doesnt work for a developer...... so can any confirm whether or not this works? also, does anyone else have any other homemade recipes for photoresist developer?

[Nasse]

I have used drain cleaner that is made of sodium hydroxide, but you have to try and error the recipe, how much water is added

[danielzink]

That's for positive resist boards not the regular negative resist boards you get at Mouser etc..


I use a pool chemical you can get at walmart for my positive resist develops.


Dan

[fatfoohy]

Im going to be using these positive boards https://www.jameco.com/webapp/wcs/stores/servlet/Product_10001_10001_616260_-1 @danielzink- what is the pool chemical that you use?

[fatfoohy]

hmmm....i found some alkalinity increaser, its chemical make up is sodium hydrogen carbonate, is this what your's is? if not what is its makeup?

[fatfoohy]

anybody?