Can anyone tell me how to get rid of all the colour pixels in a drawing?

post samples pls? thanks.

Don't save it as a gif?

I'd need to see it to know what youre asking.

acadia
Don't save it as a gif?

I'd need to see it to know what youre asking.

Also JPG. Its the worst for grain.

JPG's arent bad if you keep the file quality high. If you try to compress it, yeah it'll get some pretty nasty grain, but if you keep it large you'll retain image quality.

Not to disagree, but actually every time you re-save a jpeg at any size you lose a little quality (see below). You can always blur image a tiny bit or use a "Despeckle" filter in Photoshop.

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http://www.impulseadventure.com/photo/jpeg-compression.html

JPEG Compression, Quality and File Size

When trying to resave a digital photo, one is often faced with a decision as to what "quality settings" (level of compression) to use. The JPEG file format (more properly JFIF), allows one to select an appropriate trade-off between file size and image quality. It is important to understand that JPEG (and nearly all lossy file formats) are not suitable for intermediate editing because of the fact that repeated saves will generally diminish the working file's quality. In addition to the cumulative introduction of visual artefacts (error), repeated recompression also introduces destructive color changes. It is for these reasons that "lossless" file formats (such as TIFF, PSD, BMP, etc.) are better choices for intermediate processing. JPEG should only be used for storing the final image (ie. after editing) and possibly the initial capture.

I always save in PNG format. Keeps it nice and clean. For me, anyways. Not sure what you mean with this grain thing though, I'd have to see it to form a proper opinion.

Ok, I tried blurring it a little and it works well. Thank you everybody for your suggestions.

Work on your page as a bitmap then save the final version in the same format but putting .png at the end, I resently started doing that and the results are amazing.