ENVY 7640 PCL not honored

[User1412]

I replaced a broken HP 6700 with an  ENVY 7640.  I have an old application that uses PCL to format text printing, e.g., font size, <ESC>(s16.67H.  The 7640 is not honoring escape sequences like this.  I have tried using PJL to set the LANGUAGE to PCL but that does not help.  What do I need to do to get the printer to honor these (and other similar) escape sequences?

[dansdaduk]

According to this datasheet, the OfficeJet 6700 Premium e-All-in-One printer supports the following Page Description Languages (printer languages):

According to this datasheet, the Envy 7640 All-in-One printer supports the following PDLs:

Unfortunately (unlike with PCL5 and PCL XL), HP does not publish specifications of either of these PDLs, so it is difficult to find out just what subset of the PCL5 set of escape sequences may be supported.

Many (most?) inkjet printers have a very limited set (or no) resident fonts; as i understand it, it is usually restricted to one or two (usually fixed-pitch) fonts used for diagnostic & error situation purposes.

Use of different fonts is achieved by the printer driver rendering the source (display) font(s) on the workstation to produce printer-format raster images representing the text.

The exception to this is that the more expensive 'business-class' devices do have more printer-resident fonts (but are likely to support PCL5 anyway).