Control Diagrams

How many designers these days actually learnt about "control diagrams" let alone use them today?

The idea of a control diagram was to create a logo type or image that could be scaled with geometric rules, grids and dividers. Once the diagram was made it could be recreated on a letterhead or painted on the side of ship, by hand, and they would look identical.

After learning all about "control diagrams" and PMT (photo-mechanical-transfer) for 2 years at DeMontfort University Lincoln (95-97) they were phased out because scanning and scaling work on a computer became much faster while retaining accuracy.

I'm glad I learnt the old techniques but this industry doesn't stand still for long, that means we are always having to learn something new to remain competetive. But knowledge of how to create a solid design in any medium is the most important thing.