Sanman

I have all the ingredients to make my strobe fuel it's the typical 60/25/15/5 white strobe mix, just had a couple of questions that I can't seem to get answers to. Particularly with the ammonium perchlorine and potassium dichromate. The AP it's 200 micron and my dichromate is pretty much the consistency of beach sand, that's the way it comes from cookbook. My question is, do I have to grind down the AP and dichromate into a fine powder? I've seen Caleb make his strobe fuel and it looks grayish with a slight yellow tinge if any. But I've made a small batch for tests and I ground down the AP and potassium dichromate into a fine powder. And the mix came out looking very yellowish Orange, not at all like what I've seen from other strobe mixes with the same formula. What am I doing wrong or is that what it's supposed to look like? Hopefully I can get some help to my questions before I make the whole batch.