Opaque or not opaque...

[Rob Cozens]

>and check the blendLevel property in Rev Dictionary,

Oops!  The Dictionary says blendLevel is an image property only.

 From my review of graphic properties, it appears you need to fiddle 
with the ink property, as previously suggested.
-- 

Rob Cozens
CCW, Serendipity Software Company

"And I, which was two fooles, do so grow three;
Who are a little wise, the best fooles bee."

from "The Triple Foole" by John Donne (1572-1631)