Hey Leon....

First, if you go to ink jet & digi*** I will renounce you as my idol! haha

Now...is there any place you can get an MSDS (Material Safety Data Sheet) on the chemicals you are using. They usually have all the side effects and special handling info for the chemicals. If there is even an outside chance that you are having a reaction to these chemicals it will be in the MSDS.
Ammonia is a seriously nasty chemical! It likes to eat away those cute little hairs in your nose that help to filter out the bad icky stuff in the air. So, if you are in a room without ventilation, with our friend Mr. Ammonia...this is like a really not-so-good-thing!
There you have it...advice from Dr. BWGirl! haha (Hey! The cows listen! )
Jeanette