Mix a cry Le paint with water?

It is not clear what exactly you are asking about acrylic paint being

mixed with water.

Are you referring to a specific project you saw here on Hometalk?

Please tell us a little more about what you are wanting to accomplish so that we can try to help.

Can you be more specific what you are asking, so we can better advise.

Yes, you can thin acrylic paint with water (if that is your question), here are some guidelines to follow:

https://homesthetics.net/how-to-thin-acrylic-paint/

You can thin acrylic paint with water, but it's not always recommended because it breaks down the binder in the paint. If you do, do not use more than 30% water to paint.

Here's a post that might help you - https://www.artistsnetwork.com/art-mediums/acrylic/how-to-thin-acrylic-paint-painting-with-acrylics-for-beginners/#:~:text=Adding%20up%20to%2030%20percent,remains%20is%20called%20a%20stain.

If you are referring to acrylic paint here are your choices.

There are two choices for thinning acrylic paint: water or acrylic medium. Water breaks down the binder in acrylic, thinning the paint so that it looks like watercolor and allows it to sink into the surface, resulting in a matte finish. ... Adding 60 percent or more wat

Hello yes most acrylic paints are diluted or blended with water.

There are other several TOTALLY optional mediums you can add to your acrylic paint including flow medium -textile medium -gel medium - glazing- crackle-marbling and liquifying medium.

Most always I use water.