When building drawing's printed in adobe acrobat show text as light lines.

Quick ways to verify

• Open the PDF in Acrobat. Try to select text with the cursor.
  • If it is selectable, the PDF has real text (fonts embedded).
• If it isn’t selectable, it’s likely outlines/geometry (hairline strokes).
  
  
  
  1. In Acrobat Print dialog → Advanced:
     • Turn ON “Print as Image.”
       This rasterizes the page and prevents hairline vector strokes from staying hairline at the device. Text weight typically looks normal after this.
  2. (Optional) In Preferences → Page Display, disable “Enhance thin lines” (affects screen more than print, but it’s useful for diagnosing).
  3. Make sure “Use Local Fonts” is enabled and “Rely on system fonts” (older option) is offso Acrobat uses embedded fonts.

     
     

  4. B) Create a better PDF from AutoCAD

     In Plot → choose DWG To PDF.pc3 (preferably High Quality PDF if available), then click PDF Options… (or Properties → Custom Properties depending on AutoCAD version):

     1. Keep text as text where possible
        • Uncheck: “Convert SHX text to geometry.”
          (If you must use SHX, try to keep it as text; if not possible, see #2 below.)
        • Check: “Capture fonts used in drawing.”
        • Check: “Include TrueType text.”
     2. If you must convert to geometry, make it printable:
        • In AutoCAD, ensure the text layer/plot style (CTB/STB) has a non‑zero lineweight (e.g., 0.13–0.18 mm) so outlines don’t end up with hairline strokes in the PDF.
        • Avoid plotting with “Lineweight = Default/ByLayer 0” for text when it will be converted to geometry.
     3. General PDF plot settings
        • Use Lines Merge = Off (Overwrite) unless you specifically need merges; merging can lower the apparent darkness when many thin strokes overlap.
        • Keep Vector quality high and Plot transparency off unless needed (transparency can lighten output).
        • Verify Monochrome.ctb (or your CTB) assigns a solid black (or suitable dark) and a reasonable lineweight to text colors.

     Pros: Permanent fix; retains vector fidelity.
     Cons: Requires tweaking CAD driver/options and possibly fonts.

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     C) Prefer TrueType (or OpenType) fonts for plotted text

     • Where feasible, replace SHX text styles with TrueType fonts (Arial, Tahoma, etc.). TrueType is embedded as text in the PDF and prints consistently in Acrobat.

     Pros: Best long-term reliability across viewers and printers.
     Cons: You may have standards that require SHX; text reflow/spacing can change when switching fonts.

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     D) Acrobat Preflight (if you own Acrobat Pro)

     • Run a Preflight fixup to “Set minimum line width” or similar. This forces hairline strokes below a threshold (e.g., 0.1 pt) to a thicker minimum when printing.
     • Alternatively, flatten to an image (as a last resort) to eliminate hairline vectors.

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     A practical checklist for your case

     1. Try printing once with “Print as Image” in Acrobat → if it looks normal, you’ve confirmed the hairline vector issue.
     2. Re‑plot the PDF from AutoCAD with:
        • DWG To PDF.pc3 (High Quality)
        • Uncheck “Convert SHX text to geometry.”
        • Capture fonts / Include TrueType text
     3. If SHX is required and still becomes geometry:
        • Assign text to a CTB style with 0.13–0.18 mm lineweight (not 0).
     4. Longer term, migrate text styles to TrueType for plotted deliverables.