Putting a decal on ONE side of a transparent material, and one side only

[cooper]

I want to apply a decal to one side of a transparent lens.  I created the lens in SW, and used split lines to divide its surface into three material zones on one side of the part so I can apply different textures to thees areas but still have the part read as one material to the eye.

In one of these "zones" I am trying to apply a label.  Only UV mapping gives me the distortion-free result I am looking for, but on the back side of the material, the label is duplicated for some reason - even though the material zone is only on the front of the part and I have not placed a second label on the back of the part.  When I move the label to the left on the front surface, the rear surface label that isn't supposed to even exist moves to the right.  This means I am forced to center the label as that is the only way to conceal the unwanted second backwards label.  From the front of the lens, the label that I want to exist reads left to right.  The label I do not want reads right to left. 

How do I remove the offending label while preserving the solid materiality of the transparent?  I can provide an image but not on this forum.

[JeffM]

It sounds like you will need to separate the front surface from the back surface in SW so that materials applied to the front surface have no effect on the back.

[guest84672]

Also try unchecking twosided, and also work with the depth parameter. The latter controls the "depth of the projection"