There are no "ritual items" just physical objects that are imbued with energy for some purpose. So to answer your question, the same way you would any other object.
Yes, you can concentrate anything. Really. But Melvin, I have a question that is embarrassing because I've asked it before. How did you make a post? I feel like I have searched the entire site without finding any way to create a new post even though I have done it before. All I see anyway of doing is replying to already existing posts. Thank you and hail satan.
What I have been doing personally is just willing whatever object or area it is that I want to consecrate to be engulfed in said chosen color of energy and knowing that whatever property or properties I want it to take is being done. I've found this to be extremely effective and all without the need for vibrations, reciting pre-written affirmations, or formal rituals.