Problem: PDF print generates strange lines over hatch objects (ACAD 2012 LT)

[Anonymous]

I have created a logo which is included in all our drawings. The text part of the logo has been created by exploding a text object and hattched the remaining polylines. In in the model view all looks fine but when I print the drawing to PDF some gray lines appear over the text. If I plot the PDF to paper everything looks good, it is only the electronic versions that suffers from this problem. I need the electronic versions to hand out to our costumers so paper is not an option here and the print must look professional.

I have tried the following pdf generators, all with the same result:

Adobe

Autodesks built in DWG to PDF

Bullzip

Cute

I have viewer the result in both Adobe Acrobat 10 and Foxit reader. Both show similar problems. I can not find any solution to this problem. Can anybody help me out here?

I have attached two screenshots. One from the printed PDF and one from autocad model space.

[Anonymous]

If you have the full version of Adobe Acrobat, it includes a plugin for AutoCAD. Creating the PDF directly from the plugin works like a dream. No special settings, etc...

[pendean]

... not an option with LT of any era i that is what the OP is indeed using.

[twsmith]

Still a "feature" in 2015 ... this worked for me Hatch the boundary with a solid fill TWICE (or just copy the hatch by zero displacement) Ensure the ANGLE of one of the solid hatches is zero and the other is 90 Print to PDF and the white lines are gone HTH

[marekhrycyna]

The problem is still happening, even in ACAD2016 - but the solution is simple, instead of using solid or small size ansi hatch, use gradient with two same colours. No strange lines.

[pendean]

Nice tip.

[Anonymous]

This fix is amazing....

[Anonymous]

For past several years, I have been printing grays on my drawings using screened layers (40%, 50%, 60%) without an issie. Lately, whenever I try to print (directly or through pdf), my gray lines are broken. My default line weight for all screened layers is 0.100 mm. I treied bumping them up to 0.13 mm, but didnt't seem to work. Its really frustrating, because I can't have the level of detail on my drawings anymore that I used to have. For everything to appear correctly, i need to put on a 100% screening layer. 

[Anonymous]

You can go to PDF settings while printing. 

Go to - Properties / Quality .

There you will find default setting as 'GENERAL'.

In this setting of PDF format, diagonal lines can be seen while printing.

To avoid this, Change this setting from 'GENERAL' to 'PHOTOS'.

[Anonymous]

Try printing PDF as an image from Adobe Acrobat:

PRINT -->

ADVANCED -->

PRINT AS IMAGE -->

OK -->

PRINT -->

This seems to solve the problem for me after trying different thing, but didn't work.

[Anonymous]

If you can, try to convert PDF to TIF files.... worked for me!!!

[Anonymous]

You can also try to use a Gradient in stead of a Solid Hatch. Set the two colors in the gradient to the same color, it then is the same as a solid hatch.

U can also control de transparancy of the gradient.

This worked for me

sorry is just realised someone else mentioned this

[twsmith]

All the solutions involving generating a PDF in a raster format beg the question 'why then are you using AutoCad to produce raster graphics?' Hatching the solid fill twice with two different Angle properties of - say - 0° and 90° just works - using the standard DWG-to-PDF plotter driver the lines are gone and the output is a vector PDF. Gradient fill using the same colour twice works too - in the sense the lines are gone - but at a cost. The gradient fill is rendered as a raster image - slowly and loads slowly as well

A simple demonstration of a circle filled with a solid hatch illustrates the difference between the two methods; see zipped attachment

Hatchdemo1 = example showing the problem

Hatchdemo2 = lines gone by solid hatching TWICE (with different angles)

Hatchdemo3 = lines gone by the gradient fill 'solution' but ... file size 937 kB versus 4 kB and ugly jagged edge due to rasterization

The Adobe PDF driver (and possibly other 3rd party software) may well work but they are unnecessary and you lose other features e.g. exporting drawing layers to the PDF

[Anonymous]

---

@pendean wrote:
That solid-fill image is just a display problem in your PDF viewer: change PDF viewers (get another brand like Foxit Reader or oters) or turn off Adobe Acrobat/Reader's Smooth Line Art/Smooth Images/Enhance Thin Lines settings in the Page Display section of Preferences.

AutoCAD does not control how your PDF Reader sees solid fills.

---

Dean is spot on with this.

For those using Bluebeam: 

• Click settings in the top right
• Click preferences at the bottom of the drop down
• Select "Rending" on the left side
• Uncheck "Fill Anti-Aliasing" and click OK

Lines within solid hatch (not ANSI31 hatch) went away without the need to restart Bluebeam. The sheet was plotted from ACAD with Bluebeam's printer set for AutoCAD Drawing, 300 DPI, Graphics image compression, and everything selected under post-processing.

[Anonymous]

Dean's answer was correct, but it was not a solution to (my) problem.

It becomes difficult when you send PDF files to clients. You can't influence the clients PDF viewer settings.

Therfore it is necessary to solve the problem within AutoCAD.

I found twsmith's answer verry helpful.

[pendean]

AutoCAD has been drawing solid hatches like that since inception. If there is a change in the works and they haven't started on it it will not be until 2019-2020-2025 until it's presented.

If you need a fix now you will have to purchase BLUEBEAM or other 3rd party PDF drivers as noted in the reply above yours.

Report bugs / Autodesk Support is explained here so you can report your thoughts direct to those that can do something about it (this forum is the wrong venue) https://knowledge.autodesk.com/customer-service/account-management/subscription-management/support-o...

[Anonymous]

Easiest Fix is to Turn your Solid Color into a Gradient. You can use the same two colors for the Gradient to still get a solid flush color.

Your Welcome America 😃

[Anonymous]

Some one else on this forum had a solultion - use gradient hatch and have both colors be the same.  They said it seemed to work ?

I personally couldnt get this to work though.  For some reason, I cant plot gradient hatches.

[Anonymous]

Your solution is for a PDF viewer ?  By doing this, you're simply HIDING the 'lines' ?  Otherwise still there ?

[Anonymous]

Still in 2017 same issue - Thanks, this did it for me. I do agree about CAD having nothing to do with the display of hatching. Adjust the display settings in Adobe PDF and it should work.

Edit >> Preferences >> Page Display >>Uncheck (Smooth Line Art - & - Enhance Thin Lines ).

I hope it helps.

[Anonymous]

The reason the Autocad to PDF was a problem for ME was because I eventually converted the PDF to JPEG for insertion into MS Word or other software for illustrations.  When converted to JPEG, the lines would re-appear.  Even if you do go about re-setting the settings for Adobe PDF viewer.  Illustrator can read in DWG files, or PDF and convert them to JPEG and NOT have the lines shown. FYI.