\documentclass[10pt,a4paper]{article}
\font\olb=olb10 scaled 1000
\font\olbxfive=olbx5 scaled 1000
\font\olbxsix=olbx6 scaled 1000
\font\olbxseven=olbx7 scaled 1000
\font\olbxeight=olbx8 scaled 1000
\font\olbxnine=olbx9 scaled 1000
\font\olbxten=olbx10 scaled 1000
\font\olbxtwelve=olbx12 scaled 1000
\font\olbxs=olbxsl10 scaled 1000
\newcommand{\Ligature}{%
\input test_alphabet.tex
}
\begin{document}

Computer Modern Roman 10pt:\\{\Ligature}

Bold Roman 10pt:\\{\olb \Ligature}

Bold Extended Roman 5pt:\\{\olbxfive \Ligature}

Bold Extended Roman 6pt:\\{\olbxsix \Ligature}

Bold Extended Roman 7pt:\\{\olbxseven \Ligature}

Bold Extended Roman 8pt:\\{\olbxeight \Ligature}

Bold Extended Roman 9pt:\\{\olbxnine \Ligature}

Bold Extended Roman 10pt:\\{\olbxten \Ligature}

Bold Extended Roman 12pt:\\{\olbxtwelve \Ligature}

Bold Extended Slanted Roman 10pt:\\{\olbxs \Ligature}

\end{document}