Convert Colored Text to Black

I have the same question with you, I'm looking for resolution for weeks with no answer yet. Today I read Thom Parker's article "What's New with Acrobat 8 JavaScript?" (http://acrobatusers.com/tutorials/whats-new-acrobat-8-javascript) and there is a paragraph about the method colorConvertPage:

"Acrobat 8.0 has three new power features, page content color conversion, booklet printing and the Net Object. A power feature is one that does a lot with very little code and the first one on the list is a good example. The Doc Object has a new function called colorConvertPage(). This amazing function converts the colorspaces for every element drawn on a PDF page; images, text and paths. For example, say you need to convert to CMYK before sending your document out for printing. With this function you can convert not just to CMYK, but to any of several color profiles available on your system. Acrobat ships with several well-known, industry-wide color profiles. Of course, colorspace conversion can be done with the Preflight Tool and the Touchup Object Tool, but this capability allows color-space conversion to be part of an automation or workflow script."

I also refer to the JS API reference, and there is an example for the method colorConvertPage, which converts color profile to RGB, I wonder if there is a way to convert the color space to Gray ('G") and set the color for all text to color.black (["G",0]), let's waiting for an excellent answer together!


Example
Get a colorConvertAction object, set it up to convert everything to RGB. (Note that we do not convert any alternate spaces, hence the “space type” match is for anything but alternate spaces.)

// Get a color convert action
var toRGB = this.getColorConvertAction();
// Set up the action for a conversion to RGB
toRGB.matchAttributesAny = -1;
toRGB.matchSpaceTypeAny = ~toRGB.constants.spaceFlags.AlternateSpace;
toRGB.matchIntent = toRGB.constants.renderingIntents.Any;
toRGB.convertProfile = "Apple RGB";
toRGB.convertIntent = toRGB.constants.renderingIntents.Document;
toRGB.embed = true;
toRGB.preserveBlack = false;
toRGB.useBlackPointCompensation = true;
toRGB.action = toRGB.constants.actions.Convert;
// Convert the first page of the document
var result = this.colorConvertPage(0,[toRGB],[]);

Thanks for your response. I was unable to get the javascript to work like I wanted. I needed the color to be 100% black and all I could achieve was gray. I was able to accomplish what I needed though preflight fixups. Thanks again.