The visual language of explaining
Mid-century educational diagrams — arrows, numbered stages, simplified figures — were designed so a child could follow them. Pointed at something that doesn't need explaining, they're very funny.
Evaporation, condensation, precipitation, collection. Four numbered stages, four arrows, a simplified sun and a simplified mountain.
Every adult recognises this diagram instantly, and almost nobody has looked at one since they were nine.
Why does it read so strongly?
Because it's the aesthetic of being taught, and that's a specific feeling.
Flat mid-century diagram art was designed under real constraints — two or three inks, projected onto a wall, comprehensible to a child at the back. What came out was a visual language of pure explanation: arrows for causation, numbers for sequence, figures simplified until only the function remains.
Seeing it as an adult triggers the classroom before it triggers the content.
What are the components?
Five, and they're all doing pedagogical work.
- Numbered stages —
1.2.3.— establishing an order. - Arrows, curved, showing what causes what.
- Simplified figures: a sun that's a circle with rays, a person who's five shapes.
- Two or three flat inks, usually a warm and a cool.
- Chunky captions in a friendly geometric sans.
Nothing is rendered. Everything is a symbol, which is why it survives being printed on anything.
What's the joke version?
Diagramming something that has no stages.
THE COFFEE CYCLE. THE ARGUMENT CYCLE — 1. EVAPORATION OF PATIENCE. HOW A MONDAY FORMS.
The format's built-in authority does all of the comedy, so the drawing has to stay completely
sincere — arrows correct, numbers in order, captions dry.
That's the same discipline as a hazard label or a parts catalogue: the format is serious and the subject isn't.
Is there a straight version?
Yes, and it's quietly lovely.
An accurate diagram of something you actually care about — how a lock works, how bread rises, the stages of a specific process at your job — drawn in this register is both attractive and useful. People read it. It starts conversations in a way a slogan doesn't.
For a teacher, a scientist, a technician, that's a genuinely good gift and the format flatters the subject.
Can I use a real filmstrip?
The specific plates are the publishers' work, so no.
The visual language is entirely free — it's the shared style of mid-century educational and government publishing across many countries, produced by hundreds of studios under the same printing limits.
Which is why it feels anonymous: it was anonymous, deliberately.
Why does it print so well?
Because it's flat symbols with hard edges and few inks — close to the ideal print.
No gradients, no fine detail, a strong overall composition made of separated elements. It reads at distance because everything is a shape, and it holds together on any garment colour as long as the two inks have contrast against it.
Same family of properties as flat vector, with a much more specific period voice.
What size should the captions be?
Bigger than the original.
Real filmstrip captions were sized for projection, which means they're proportionally small on a printed page. On a chest they need to be readable at conversational distance or they turn into texture — the weave has a floor.
Four captions, large. Not twelve, small.
How do I get one made?
Describe the process at JustOG — real or absurd — with the numbered stages. Pick a direction, drag the crop frame, see it composited on the real garment, and it's made to order and shipped.
Designs other people have published are in the shop.
Four arrows and a number. You already know how to read it.