It is not always easy to tell which side of clear glass has the dichroic coating. The coated side is the side that has a rougher texture.
Use any pointed object such as a pencil, toothpick or even your fingernail and hold this object to the glass. If the reflection touches the object, then this is the coated side of the dichroic glass. A space between the reflection and the object means this is not the coated side.
How do you remove the coating?
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