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Table 1: Results of the four conversion methods 

Criteria

 

 

1) Open and convert using Adobe Acrobat

 

 

2) Acrobat PDFMaker

 

 

3) Save as PDF

 

 

4) Adobe PDF printer (Distiller)

 

 

Visual inspection

 

 

No errors, but partially unsufficient image quality. Furthermore, some text could neither be searched nor copied.

 

 

One file could not be reliably converted

 

 

In 4 out of 10 files some figures were not acceptable, as transparent objects had become non-transparent.

 

 

No errors

 

 

Links und references

 

 

No errors

 

 

No errors

 

 

Broken endnote links

 

 

Broken hyperlinks, broken endnote links

 

 

Compliance with PDF/A-1b standard

 

 

No errors

 

 

Four of the 10 files were not compliant with the PDF/A-1b standard

 

 

One of the 10 files was not compliant with the PDF/A-1b standard.

 

 

No errors

 

 

Size of the PDF/A-1b files

 

 

Up to four times larger than original

 

 

Up to five times larger than original

 

 

Up to six times larger than original

 

 

Up to twice as large as original

 

 

Computing time (Intel Core i7, 3.4 GHz)

 

 

Up to several minutes

 

 

Up to several minutes

 

 

Up to several seconds

 

 

Up to several seconds

 

 

 

1 See the following website for further instructions (accessed 01/29/2015): http://blogs.adobe.com/acrolaw/2007/01/pdfa_in_action . Acrobat Distiller converts from Postscript (*.ps) to PDF. Also with the free OpenOffice 3 for Windows (Oracle) you can convert to PDF/A-1b with Adobe Distiller.
2 Members of the ETH may order Adobe Acrobat Professional at https://ides.ethz.ch. Please contact your IT support. See also Adobe Acrobat XI : Product comparison, http://www.adobe.com/products/acrobat/product-comparison.html (accessed 01/29/2015)
3 See the following website for further instructions (accessed 29/01/2015): http://blogs.adobe.com/acrolaw/2011/05/using-save-as-to-to-conform-to-pdfa
4 See the following website for further instructions (accessed 29/01/2015): http://helpx.adobe.com/acrobat/using/creating-pdfs-pdfmaker-windows.html
5 See the following website for further instructions (accessed 29/01/2015): https://support.office.com/en-us/article/Save-as-PDF-d85416c5-7d77-4fd6-a216-6f4bf7c7c110#bm11