1381381381Beginning with PDF 1.5 (Acrobat 6) version 4 ICC profiles are supported for ICC based color spaces. PDF/X-1a, PDF/X-3 and PDF/A-1 prohibit the use of version 4 ICC profiles, instead version 2 ICC profiles must be used where needed.2020-11-06 13:07:41Filled object uses constant alpha with a value smaller than 1.0 which implies transparency. Beginning with PDF 1.4 (Acrobat 5) transparency is supported. Some PDF-based ISO standards prohibit the use of transparency. Acrobat PDF Optimizer may be used in order to flatten transparency.2020-11-06 13:11:41The PDF specification requires that each page defines a Media Box.2020-11-06 13:11:41If the destination profile of the OutputIntent in a PDF file is not RGB, PDF/X prohibits an alternate color space that is DeviceRGB.2020-11-06 13:11:41The title entry in a PDF document is required by PDF/X. Go to the File menu and select the Properties... entry. You can enter the title in the Title field then.2020-11-06 13:11:41If the destination profile of the OutputIntent in a PDF file is not RGB, PDF/X prohibits that an object uses DeviceRGB.2020-11-06 13:11:41Halftone entries other than type 1 or 5 are prohibited by PDF/X.2020-11-06 13:11:41The OutputIntent Info entry contains XML code instead of plain text providing additional information about the intended printing condition.2020-11-06 13:11:41The creation date entry in a PDF document is required by some PDF/X standards.2020-11-06 13:11:41The ICC profile embedded in an OutputIntent must be of type 'prtr' - it must be a printer profile.2020-11-06 13:11:41Some PDF/X standards require that if a page contains a BleedBox entry there must not be any other viewer preferences entries in the document other than MediaBox or BleedBox. 2020-11-06 13:11:42Beginning with PDF 1.5 (Acrobat 6) images with a bit depth of 16 bits per component are supported. PDF/X-1a, PDF/X-3 and PDF/A-1 prohibit the use of 16 bit images.2020-11-06 13:11:42PDF/X requires that the RegistryName entry in an OutputIntent is of type string.2020-11-06 13:11:42PDF/X requires that the value for the Trapped key is of type name.2020-11-06 13:11:42PDF/X requires that the OutputIntent Info entry is of type string.2020-11-06 13:11:42A PDF may contain alternate images which are usually being used in order to speed up interactive display. Alternate images should not be default for printing. ISO standards for data exchange in prepress (PDF/X) prohibit that alternate images are default for printing.2020-11-06 13:11:42Determines whether interactive form fields are located (completely or partially) within the areas designated by the BleedBox (trim size of a page plus bleed area) or TrimBox (trim size of a page). PDF/X prohibits interactive form fields inside this area.2020-11-06 13:11:42TrapNet PCM CMYK but destination profile not CMYK2020-11-06 13:11:42Beginning with PDF 1.5 (Acrobat 6) compressed object streams are supported. Compressed object streams are prohibited in any PDF/X-1a, PDF/X-3 and PDF/A-1 file.2020-11-06 13:11:42A blend mode other than “Normal“ or “Compatible” makes the respective objects appear transparent. Beginning with PDF 1.4 (Acrobat 5) transparency is supported. Some PDF-based ISO standards prohibit the use of transparency. Acrobat PDF Optimizer may be used in order to flatten transparency.2020-11-06 13:11:43Even if an encrypted file does not require a password, many applications (incl. Photoshop and InDesign) won't allow one to do anything with the file. In addition, PDF/X and other PDF-based ISO standards prohibit encryption.2020-11-06 13:11:43The modification date entry in a PDF document is required by PDF/X.2020-11-06 13:11:43PDF-based ISO standards prohibit the use of transfer functions in halftone dictionaries if not explicitly required by the PDF specification for the respective halftone type. (If the halftone dictionary is a component of a type 5 halftone and represents either a non primary or nonstandard primary color component a transfer function is required.)2020-11-06 13:11:43If TrapNet annotations are present in a PDF/X file, the Trapped key must be set to True.2020-11-06 13:11:43A valid PDF/X file must not have more than one PDF/X OutputIntent entry.2020-11-06 13:11:43Due to patent and licensing issues LZW compression is prohibited in all PDF-based ISO standards.2020-11-06 13:11:43Some PDF/X standards prohibit the presence of PrinterMark annotations inside the TrimBox area.2020-11-06 13:11:43Either ArtBox or TrimBox should be defined for pages in a PDF file that are used in prepress. PDF/X ISO standards require the presence of one of these boxes.2020-11-06 13:11:43The Halftone name key is prohibited by PDF/X.2020-11-06 13:11:44Some PDF-based ISO standards require that if DeviceCMYK is used the output intent must be defined for CMYK.2020-11-06 13:11:44ISO standards for PDF/X require that MediaBox, BleedBox and TrimBox (or sometimes ArtBox) are nested properly.2020-11-06 13:11:44The PDF document is damaged. While Acrobat always tries to repair the document when it is opened, there is no guarantee that the document can be processed reliably.2020-11-06 13:11:44If an OutputIntent does not contain a destination profile, PDF/X-3 prohibits an alternate color space that is device independent.2020-11-06 13:11:44JavaScripts are an advanced feature in Acrobat to add interactivity to PDF pages as well as to form fields. They are prohibited in some PDF-based ISO standards.2020-11-06 13:11:44Beginning with PDF 1.6 (Acrobat 7) the page property "UserUnits" - a scaling factor for the page coordinate space - is supported. By means of the UserUnits scaling factor page sizes beyond the 200 by 200 inches as supported until Acrobat 6 are now possible. UserUnits are not supported by some PDF-based ISO standards.2020-11-06 13:11:44A transparent soft mask is present. Beginning with PDF 1.4 (Acrobat 5) transparency is supported. Some PDF-based ISO standards prohibit the use of transparency. Acrobat PDF Optimizer may be used in order to flatten transparency.2020-11-06 13:11:44Text uses OpenType font. Support for OpenType fonts was introduced in PDF 1.6 (Acrobat 7). Some PDF-based ISO standard prohibit the use of OpenType fonts.2020-11-06 13:11:44The Document ID in a PDF document is required by some PDF/X standards.2020-11-06 13:11:45FontFauxing for a TrapNet annotation is prohibited by PDF/X.2020-11-06 13:11:45At least one ICC profile is syntactically incorrect.2020-11-06 13:11:45OPI information is used in order to replace embedded images with external images. The use of OPI information is prohibited in PDF-based ISO standards.2020-11-06 13:11:45Some PDF-based ISO standards require that if a TrapNet annotation is present, it must use the same color space as the destination profile in the output intent.2020-11-06 13:11:45PDF/X requires that the OutputConditionIdentifier is of type string.2020-11-06 13:11:45The GTS_PDFXVersion key contains the name of the ISO standard with which the PDF claims to be compliant. It must be of type string.2020-11-06 13:11:45The OutputConditionIdentifier is required by PDF/X.2020-11-06 13:11:45If the destination profile of the OutputIntent in a PDF file is not CMYK, PDF/X prohibits an alternate color space that is DeviceCMYK.2020-11-06 13:11:45An image may have an alternate representation (usually such alternate images use smaller resolution or high compression and their intention is to speed up page display). Some PDF/X ISO standards require that image and it’s alternate have the same size and position.2020-11-06 13:11:46Fonts should always be embedded for prepress files. Fonts must be embedded for PDF/X-1 and PDF/X-3 files.2020-11-06 13:11:46This page is a separated plate, it does contain only information for one plate. The use of separated pages is prohibited in some PDF/X standards.2020-11-06 13:11:46PDF/X requires that the Trapped key is set to either true or false.2020-11-06 13:11:46A data stream in the document uses a filter type prohibited in PDF/X-1a or PDF/X-3. These ISO standards allow for: ZIP (FlateDecode), RunLengthDecode, CCITTFaxDecode, JPEG (DCTDecode) and ASCII (ASCIIHexDecode or ASCII85Decode).2020-11-06 13:11:46Embedded PostScript is not allowed PDF in some based ISO standards.2020-11-06 13:11:46File specifications in a PDF document are prohibited by some PDF-based ISO standards.2020-11-06 13:11:46PDF/X requires the presence of an OutputIntent with a subtype of GTS_PDFX.2020-11-06 13:11:46At least one embedded font is syntactically incorrect.2020-11-06 13:11:47Beginning with PDF 1.6 (Acrobat 7) annotations of type "3D" are supported. However, 3D annotations are prohibited by some PDF-based ISO standards.2020-11-06 13:11:47Some PDF-based ISO standards require that if DeviceGray is used the output intent must be defined either for CMYK or for Gray. In this case a spot color uses an alternate color definition in DeviceGray.2020-11-06 13:11:47A transparency group entry is present. Beginning with PDF 1.4 (Acrobat 5) transparency is supported. Some PDF-based ISO standards prohibit the use of transparency. Acrobat PDF Optimizer may be used in order to flatten transparency.2020-11-06 13:11:47Some PDF-based ISO standards require that a PDF has either a TrimBox or an ArtBox but not both.2020-11-06 13:11:48An alternate image uses a filter type prohibited in PDF/X-1a and PDF/X-3. This ISO standards allow for: ZIP (FlateDecode), RunLengthDecode, CCITTFaxDecode, and ASCII (ASCIIHexDecode or ASCII85Decode).2020-11-06 13:11:48TrueType fonts may have a flag indicating whether their license permits embedding. Some ISO standards explicitly require that these fonts shall not be used even if they are nevertheless embedded.2020-11-06 13:11:48Page description contains embedded PostScript (PostScript Form XObject)2020-11-06 13:11:48All fonts embedded into a PDF have to contain glyphs for all characters used in the PDF. This is required by some PDF-based ISO standards such as PDF/X.2020-11-06 13:11:48The GTS_PDFXVersion key is required by PDF/X.2020-11-06 13:11:48The OutputCondition contains XML code instead of plain text describing the intended printing condition.2020-11-06 13:11:48The data stream for at least one image is syntactically incorrect.2020-11-06 13:11:49TrapNet process color space is Gray. Some PDF-based ISO standards require that if a TrapNet annotation is present, it must use the same color space as the destination profile in the output intent.2020-11-06 13:11:49Actions in a PDF file are often used to add interactivity. They are prohibited in some PDF-based ISO standards.2020-11-06 13:11:49The PDF/X-1a or PDF/X-3 entry in the document information (”GTS_PDFXVersion key”) must contain a correct value for identification of the respective PDF/X standard.2020-11-06 13:11:49The PDF file contains a TR2 (transfer curve) entry. Some PDF/X standards prohibit the use of this entry.2020-11-06 13:11:49Up and until Acrobat 6 the size of a PDF file was limited to 2 GB. Beginning with Acrobat 7 file sizes above 2 GB are supported.2020-11-06 13:11:49A transparent soft mask is present. Beginning with PDF 1.4 (Acrobat 5) transparency is supported. Some PDF-based ISO standards prohibit the use of transparency. Acrobat PDF Optimizer may be used in order to flatten transparency.2020-11-06 13:11:49Transfer curves are prohibited in some PDF-based ISO standards. Use Acrobat Distiller 5's "Apply transfer curves" to avoid transfer curves in PDF files without compromising page contents.2020-11-06 13:11:49Some PDF/X standards require that the PDF/X Output Intent if present contains a destination profile.2020-11-06 13:11:49The halftone phase (HTP) entry is prohibited by PDF/X standards.2020-11-06 13:11:50An image uses a filter type prohibited in PDF/X-1a and PDF/X-3. This ISO standards allow for: ZIP (FlateDecode), RunLengthDecode, CCITTFaxDecode, and ASCII (ASCIIHexDecode or ASCII85Decode).2020-11-06 13:11:50This condition filters for operators that are not defined in the PDF specification and almost always will cause errors.2020-11-06 13:11:50Beginning with PDF 1.5 (Acrobat 6) layers (called "optional content" in the PDF specification) are supported. They are not allowed in some PDF-based ISO standards.2020-11-06 13:11:50A page uses a filter type prohibited in PDF/X-1a or PDF/X-3. This ISO standards allow for: ZIP (FlateDecode), RunLengthDecode, CCITTFaxDecode, JPEG (DCTDecode) and ASCII (ASCIIHexDecode or ASCII85Decode).2020-11-06 13:11:50A TrapNet annotation is a means of defining trapping for PDF files. There are some syntactical requirements for these annotations as they belong to the print content while most other annotations do not. If a TrapNet annotation error occurs it is probable that the trapping will not be applied accordingly when the PDF is printed.2020-11-06 13:11:50PDF/X requires that the OutputCondition is of type string.2020-11-06 13:11:50Up and until Acrobat 6 the size of a stream in a PDF file was limited to 2 GB. Beginning with Acrobat 7 streams with a size above 2 GB are supported.2020-11-06 13:11:50The OutputConditionIdentifier contains XML code instead of plain text with the identifier entry.2020-11-06 13:11:50Stroked object uses constant alpha with a value smaller than 1.0 which implies transparency. Beginning with PDF 1.4 (Acrobat 5) transparency is supported. Some PDF-based ISO standards prohibit the use of transparency. Acrobat PDF Optimizer may be used in order to flatten transparency.2020-11-06 13:11:51Some PDF-based ISO standards require that if DeviceGray is used the output intent must be defined either for CMYK or for Gray.2020-11-06 13:11:51Annotations inside the trim or bleed area of a page may cause unpredictable print output. They are not allowed in PDF/X files.2020-11-06 13:11:51Some PDF/X standards require that the PDF/X Output Intent contains a destination profile. If this is not the case the intended output condition must match a characterization name at the ICC registry (www.color.org).2020-11-06 13:11:51Embedded PostScript is not allowed in some PDF-based ISO standards.2020-11-06 13:11:51This page has ink coverage above 290% and may cause problems due to the high amount of ink being applied to the paper when printed.2020-12-09 21:06:45Document generates more than four plates when separations are created.2020-12-09 21:06:46There are objects using spot color.2020-12-09 21:06:46Hairlines may disappear when they are printed. Only lines within the TrimBox are listed.2020-12-09 21:14:22Identifies very small text with a size of less than 5 pt. It might be difficult to print small text in the selected printing process.2020-12-09 21:14:22Continuous tone image resolution lower than specified2020-12-09 21:14:23Page is empty2020-12-09 21:16:31At least one page is empty2020-12-09 21:16:31If the version of a PDF document is newer than the PDF version supported by a given version of Adobe Acrobat or Adobe Reader, a warning message will be displayed. The PDF version alone though does not necessarily cause issues, as long as no features are used from a newer PDF version.2020-12-10 22:08:06PDF/X-4 requires that the PDF/X-4 entry is present in the document's XMP Metadata.2020-12-10 22:09:03There is no trapped key present in the XMP metadata. The trapped key indicates whether the PDF has been trapped or not. PDF/X-4 requires that the Trapped entry is present in the document's XMP Metadata in the user defined ‘pdfx” name space.2020-12-10 22:09:03The VersionID in the XMP Media Management Schema (xmpMM) is the version identifier for respective resource. This entry is required by some PDF-based ISO standards for file identification.2020-12-10 22:09:04Either ArtBox or TrimBox should be defined for pages in a PDF file that are used in prepress. PDF/X ISO standards require the presence of one of these boxes.2020-12-10 22:09:04Object uses RGB (DeviceRGB).2020-12-10 22:19:26Object uses RGB (DeviceRGB).2020-12-10 22:19:26Finds images that use colors other than DeviceCMYK or spot colors - i.e. any images using device independent color or DeviceRGB.2020-12-10 22:19:27Finds images that use colors other than DeviceCMYK.2020-12-10 22:19:27The RenditionClass entry in the XMP Media Management Schema (xmpMM) is used for derived versions of a media resource. If the file is not a derived version it should be present but set to “default”. This entry is required by some PDF-based ISO standards for file identification.2020-12-11 17:38:30Continuous tone image resolution higher than specified2020-12-11 17:38:30This entry of the predefined Dublin Core Schema defines the title of the document. It is required by some PDF-based ISO standards.2020-12-11 17:38:30Lists all text objects using artificial bold style.2020-12-11 17:38:31Font is not embedded in the PDF file.2020-12-11 17:40:14Fonts should always be embedded for prepress files. Fonts must be embedded for PDF/X-1 and PDF/X-3 files.2020-12-11 17:40:14In order to make sure that all characters in a PDF are accurately displayed all required fonts should be embedded into a PDF file. Some PDF-based ISO standards require that all fonts used for text are embedded unless that text uses text rendering mode 3 (invisible text).2020-12-11 17:40:14A data stream in the document uses a filter type prohibited in PDF/X-4. This ISO standards allows for: ZIP (FlateDecode), RunLengthDecode, CCITTFaxDecode, JBIG2Decode, JPEG (DCTDecode), JPEG2000 (JPXDecode) and ASCII (ASCIIHexDecode or ASCII85Decode).2020-12-11 17:41:25An image uses a filter type prohibited in PDF/X-4. This ISO standards allows for: ZIP (FlateDecode), RunLengthDecode, CCITTFaxDecode, JBIG2Decode, JPEG (DCTDecode), JPEG2000 (JPXDecode) and ASCII (ASCIIHexDecode or ASCII85Decode).2020-12-11 17:41:25There is no XMP metadata for a Certificate in the PDF document.2021-05-06 11:56:35The Certificate is valid and reports warnings.2021-05-06 11:56:56The name entry of an optional content configuration dictionary (OCCD) is used to identify the respective view state. Some PDF-based ISO standards (namely PDF/X-4) require that each OCCD has a name entry which is unique throughout the PDF.2021-03-02 13:43:24White objects should be set to knock out, as otherwise they may simply disappear when the PDF is printed. This check lists vector objects inside the TrimBox using white for stroke.2021-03-02 13:43:24White objects should be set to knock out, as otherwise they may simply disappear when the PDF is printed.2021-03-02 13:43:24White objects should be set to knock out, as otherwise they may simply disappear when the PDF is printed. This check lists vector objects inside the TrimBox using white.2021-03-02 13:43:25ISO standards for PDF/X require that MediaBox, BleedBox and TrimBox (or sometimes ArtBox) are nested properly.2021-03-02 13:43:25White objects should be set to knock out, as otherwise they may simply disappear when the PDF is printed. This check lists vector objects inside the TrimBox using white.2021-03-02 13:43:25White objects should be set to knock out, as otherwise they may simply disappear when the PDF is printed.2021-03-02 13:43:25Document has more spot colors than specified.2021-03-02 13:43:25White objects should be set to knock out, as otherwise they may simply disappear when the PDF is printed. This check lists vector objects inside the TrimBox using white for stroke.2021-03-02 13:43:25The Certificate is valid and reports success.2021-05-06 11:57:23The PDF document has been modified since the Preflight Certificate was applied.2021-05-06 11:47:55The XMP History entry contains a high-level list of user actions that resulted in the respective PDF. The "parameters" field contains some additional description of an action. Some PDF based ISO standards require that this entry is present in all XMP History entries.2021-09-04 16:35:50In XMP metadata for a page, an XMP metadata property is used, which is not predefined in the XMP specification dated September 2005. There is an XMP extension schema present in the PDF but it does not contain a definition for this property. Some PDF based ISO standards require that all XMP metadata properties are either predefined or defined in an embedded extension schema.2021-09-04 16:35:50The Preflight Certificate is not valid or reports errors.2021-09-04 16:38:412021-10-05 18:07:302021-10-05 18:07:302021-10-05 18:07:302021-10-05 18:07:30A spot color uses different representations throughout the PDF. This may lead to unpredictable results if the spot color is converted to CMYK (or RGB). Some PDF-based ISO standards require that the representations are consistent.2021-10-20 09:29:08The PDF format version number in the PDF file header is greater than 1.3.2023-06-06 17:11:11Alternate color space for a spot color is neither DeviceCMYK nor DeviceGray. This is prohibited by some PDF-based ISO standards.2025-07-10 12:54:47Object uses a device independent color space (ICC based Gray/RGB/CMYK, Lab, CalRGB or CalGray).2025-09-26 10:04:21