Illustrator white line over black background is 5% black instead of white

[Nivin]

I have a white line on top of a black background that is showing 5% Black. The white line has no Transparency, no Opacity. I even put in on a new layer. Even though it reads 100% white, it is coming out about 5% black.

If I copy and paste it in place about 3 or 4 times, it will then appear 100% white. So, I think it has something to do with Transparency.

After outlining the stroke and filling with white we were able to get it to be 100% white, but why will the stroke not be 100% white?

 

[Nivin]

We finally figured this out. The original art has the strokes Black with Opacity at 90%. When changed strokes to White 100%. But even though everything said 100% Opacity, it was holding on to the 90% Opacity.

When we change the original stroke to Black 100%, THEN changed to White, it worked!

 

[Possumgal]

That's why you sometimes have to try everything you can think of, even if it doesn't make sense. I've had weird problems like that with incoming artwork quite a bit.