Hi,

I suppose blending is not the best solution, because i depends on other layers.
Why don't you use transparancy tab of the properties of the raster?
There you can set pixel values to be transparent (0-100%). In your case from 0 to 0 value 100% transparent Then change render type to Singleband pseudocolor on the style tab and set individual color for any value.
In your case add 1 to the list and select a color for it.

Zoltan

On Tue, 12 Aug 2014, G. Garibaldi wrote:

Beginning with a black and white raster, black lines on a white background, I'd like to end up with a raster image with no white background with only the black lines showing. Additionally, I'd like the black lines to be a different color, bright red, bright green, etc.

This is what I've done:

Select raster layer properties>color rendering>blending mode>burn.

This removes the white background and shows only the black lines.

Going further and selecting properties>hue>colorize only lightly tints the black lines to the selected color, not really the desired result.

How can I make the properties>hue>colorize change the black lines to some bright highly saturated color?

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