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cocoazenith

Roughen edges? Expand art stroke?

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Hello all,

 

So I have to send the print file to the printing house and need an art brush stroke I created to be only 1 color.

 

The brush preset has all sorts of tints and the printing house returned it and told me they need it 1 color only.

 

I only need it for it's rough edges. I tried expanding the stroke so that I can fill it with only one color but that's not possible in AD. I made the stroke normal and expanded it but I cannot apply a roughen edges effect to it now because it does not exist.

 

Please Affinity...

 

Anyone have a workaround to my problem?

 

! Attached is a zoom on the brush.

post-40203-0-84428600-1495529912_thumb.png

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My guess from what you wrote is that the stroke was made w. a textured vector brush. Those are strokes created by dragging a monochrome bit map, in this case, a grey scale, over a vector. The edges of the shape cannot be expanded because they are not vectors. They have various tones by design. 

 

Assuming the stroke is a vector stroke, here's a work around that might do the job. Select the curve, and set the blend mode to multiply. Copy and paste it repeatedly on top of itself. My strials need 10 or more copies for the stroke to turn to a solid rough edge black. Those I was able to export as .pdf, .eps, .svg, etc. If for some reason you need actual vector outlines, use an exported tiff, and run it thru an image vectorizer. There are online services available, very inexpensive dedicated app, or freeware Inkscape, tho' it is a bit more complicated to use.


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My guess from what you wrote is that the stroke was made w. a textured vector brush. Those are strokes created by dragging a monochrome bit map, in this case, a grey scale, over a vector.

 

The thing is, the "grey" in the OP's zoomed-in screenshot isn't greyscale. My screen colour picker tells me that it's RGB [100, 95, 90] (or thereabouts, depending on exactly where I pick the colour from).

 

Edit: Come to think of it, I'm not sure that the above observation is terribly relevant, since the printing house isn't going to be outputting to RGB: they just want something that rips to a single plate.


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The thing is, the "grey" in the OP's zoomed-in screenshot isn't greyscale. My screen colour picker tells me that it's RGB [100, 95, 90] (or thereabouts, depending on exactly where I pick the colour from).

 

Edit: Come to think of it, I'm not sure that the above observation is terribly relevant, since the printing house isn't going to be outputting to RGB: they just want something that rips to a single plate.

 

Yes, it looked sort of greenish to my eyes, but much closer to grey scale than something like sepia or indigo tone.  FWIW, I tried the work around starting with a pale tan stroke, and it took over 20 copies to approach solid black.


iMac 27" Retina, c. 2015: OS X 10.11.5: 3.3 GHz I c-5: 32 Gb,  AMD Radeon R9 M290 2048 Mb

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Huion WH1409 tablet

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two options spring to mind:

 

1 ) FX >  Color Overlay. Pick any color you want: spot, 100% one of the process colors.... whatever.

 

2 ) Draw a box (large enough to contain the artwork) with fill set to your desired color. Place brush work in mask position.

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I went back and looked at some of my work around results. Turned out that when I zoomed in quite a bit, I could still see traces of grey, not pure black. When I put some into the vectorizer, and did a little adjustment w. the parameters, I could get pure black all thru, w edges that were more or less smooth, depending on the parameter settings.

 

Attached, the original .png quadrupled on the right, exported, and the vectorized output on the left.

 

post-34886-0-72590500-1495562644_thumb.jpg


iMac 27" Retina, c. 2015: OS X 10.11.5: 3.3 GHz I c-5: 32 Gb,  AMD Radeon R9 M290 2048 Mb

iPad 12.9" Retina, iOS 10, 512 Gb, Apple pencil

Huion WH1409 tablet

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I think i'll just draw/copy the rough edges manually with the tablet.

Then convert the stroke to basic one, expand it and Add the edges to this expanded shape.

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maybe using a solid texture brush will give just one color.

i have made one and it looks like there is only one color used.

 

post-35341-0-73459400-1495628064_thumb.png

 

 

test edge.zip


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maybe using a solid texture brush will give just one color.

i have made one and it looks like there is only one color used.

 

attachicon.gifedge test.png

 

Pretty nice. I haven't messed w. brush making much, but this reminds me to get back in practice.


iMac 27" Retina, c. 2015: OS X 10.11.5: 3.3 GHz I c-5: 32 Gb,  AMD Radeon R9 M290 2048 Mb

iPad 12.9" Retina, iOS 10, 512 Gb, Apple pencil

Huion WH1409 tablet

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I guess I misunderstood what you were looking for. Like Alfred, I was thinking a single color separation.

 

If you want a solid color using an existing brush, can't u just use a Levels (or Curves) adjustment on the alpha channel?

The closer the black/white slider values are to each other the less antialiasing you will have.....i.e. 18% black and 18.1% white will basically have no gray value.

 

Original brush.

Solid spot color with antialiased edge.

Pure 100% black channel only version with no aliasing.

and Applied to a square.... spot (aliased) and rich black (non aliased).

 

post-12544-0-02108100-1495653648_thumb.png

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