Au Concert (for Ault & Wiborg inks) - poster
The pattern
This still is filed under Demonstration ad.
Define
The product does the arguing. The viewer sees the thing work, not a slogan about the thing working.
Mechanism
Proof by performance. The claim is the action: a visible, testable result the reader can replay.
Verdict
We can show a result in seconds
Why it works
Self-demonstration: a trade ad for ink that is executed as a virtuoso piece of colour printing turns the medium into the evidence, and leaves the prospect holding proof instead of an assertion. The image is chosen for difficulty rather than relevance - spatter, tonal gradation, deep black and metallic yellow in one sheet - so the piece quietly shows the ink's range. Typographically, the varying word sizes in the claim let the eye land on FINE PRINTING and LITHOGRAPHIC INKS before it reads the connecting words, so the claim registers before it is read.
Steal this when
You sell an input or a component that buyers judge by results - ink, paper, camera, software, agency craft - and you can make the marketing piece itself the hardest possible test of the product. Use the shrink-and-swell typographic setting when a claim has three or four words that matter and several that only glue them together.