If you do not want the color to darken I would recommend a water based clear poly finish, one marketed as water clear.
Pat
Sent from my Verizon, Samsung Galaxy smartphone
-------- Original message --------
From: "Greg Oskay (goskay25@att.net)" <mailer@mail2.clubexpress.com>
Date: 3/29/19 10:15 AM (GMT-05:00)
To:
Subject: [Ask A Member] Finishing <<$227112262277$>>
I am in the process of creating a collage using tiles cut from at least 33 types of trees that grow on our farm. There will be a cross section, quarter sawn and plain sawn tile from each species. They will be various sizes but average about 3 in. x 3 in.
Question: What would be the best type of finish to preserve the wood yet not distort the natural color and texture of the wood?