Ionic animation problem

Hi to everyone, i’m new at Ionic Framework. I’m trying to implement some animation on my first app, with animate css. I have a big problem: when i use a animation with a delay, my item (text or image) are displayed before the animation start. I tried to set the opacity to 0, but with this solution after the animation all my items disappariing (because my opacity turn back to 0).

How can i resolve my problem only with the css? I have this problem only if i set up a delay with my animation.

I think that setting this property should work as you expect:

-webkit-animation-fill-mode: forwards;
animation-fill-mode: forwards;

Work very well. Thank you very much!