If any program is capable of BLK to PDF conversion, it would be ABBYY Finereader Pro software from which .blk files (area templates) originate. We couldn't find any specifics about this conversion or whenever it is actually usefull or even possible to do it.
Convert ABBYY FineReader area template file to Adobe Portable document format.
We have found one software suitable in our database for this conversion.
Microsoft Windows software - convert blk to pdf on Windows
ABBYY FineReader is an intelligent and easy-to-use OCR (Optical Character Recognition) and PDF conversion software that is the optimal alternative to manual data entry and typing. It is an ideal choice for professionals that want to save time and effort while producing excellent results. It provides powerful functionality for converting images received from a scanner, a digital camera or by fax, as well as PDF files, into editable and searchable formats.
Convert from blk file
to pdf file
The table with program actions contains information about what each program is capable of doing with their files. This may be a good pointer for further searches for certain file conversions and help you find the converter you are looking for if our search result is insufficient for you. However, it is far from perfect and may sometimes show results which are not really usable because of the nature of the software handles the files. So a conversion that appears as possible, just because of matched actions, may in fact not be possible.