Quote Originally Posted by edwoo11 View Post
i was looking for ammonium dichromate also, but it's very difficult to get, and makes expo time much higher. though I 'd like to try...
What process is this? I've never heard about ammonium dichromate being slower than potassium (though I have heard about sodium dichromate being less active than either of the other 2).

You need to make sure you account for the difference in molecular weight of the 2 compounds, but I don't have the numbers at-hand to give you.