梅威瑟：
\documentclass{article}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{kpfonts}
\usepackage[a-1b]{pdfx}
\usepackage{mwe}
\begin{document}
\sffamily\scshape%
\blindtext%
\end{document}
虽然它成功编译为 PDF 文件，但 PDF 文件不符合 PDF/A 标准。根据https://www.pdf-online.com/osa/validate.aspx， 我有：
Validating file "test.pdf" for conformance level pdfa-1b
The width for character 68 in font 'IYLNAZ+Sf-Kp-Sc-Regular' does not match.
The document does not conform to the requested standard.
The document contains fonts without embedded font programs or encoding information (CMAPs).
The document does not conform to the PDF/A-1b standard.
Done.