Bubble, inflated from the inside

Bubble is a face that looks inflated from the inside. The contour of every letter has been pushed outward until the shapes press against each other, and a single gloss highlight is punched out of each one.

It covers 105 characters — English only — in one weight, with no italic. There is no bold to emphasise with and no accented characters to set another language with.

It is also the face in this library with the least room inside its letters — a polite way of saying it fails at small sizes before any of the others do.

One light source, one highlight

The gloss is the part that took discipline. A single light source produces a single highlight — that is not a preference, it is how a lit surface behaves, and the eye knows it without being told.

Put two highlights on one letter and the drawing stops reading as a shiny object and reads as a mistake. Not as a bolder effect: as a rendering error, the kind of thing that happens when a filter has been applied twice.

The rule across the alphabet is one gloss per letter, with no exceptions where a second would have been easy to justify. It is the least visible decision in the face and the one holding it together.

The gloss is punched out rather than painted on, so it shows whatever is behind the letter. On a light ground that reads as a highlight, which is the intent; reversed out of a dark ground, the same hole goes dark and the letter looks bitten rather than lit.

The shapes push their own counters shut

Inflating a letter has one unavoidable cost: the more the contour is pushed out, the smaller the white inside becomes. The gesture that makes the face look full is the same gesture that takes the room away.

Every typeface has a size at which its counters close. Bubble reaches that size sooner than anything else in the family — the e, the a, the g and the figures have the shortest distance to travel before the white disappears and the letter becomes a blob.

That is what caps the small end of the size range — not a rule imposed from outside; the drawing imposes it.

Round letters carry very little skeleton

A reader does not identify letters by examining them. The eye works from a skeleton — where a stroke goes, where it stops, which way it turns — fast enough that words are recognised before the shapes are looked at.

Roundness takes most of that away. When every letter is pushed toward the same full shape, the differences the eye relied on shrink, and it has to slow down and look properly.

Good for a word, bad for a sentence. This is why the face carries a shop front or a wrapper so easily and comes apart in a paragraph faster than the counter problem alone would explain.

Where it belongs

Bubble is for things meant to be enjoyed, and it says so from across a room. It wants a short word, a large size and a flat colour behind it.

Confectionery and soft drinks, ice cream, bubble tea — cups, wrappers, shopfronts, menu boards. The specimen word is not a joke; this is what the face was drawn for.

Children's products: toys, board games, party goods, a cover for a book aimed at readers under ten. Stickers, balloons, badges, T-shirts — anything where the type is the graphic rather than the caption on it.

A logotype is the strongest single use, provided the name is short and the tone unserious: set once, spaced by hand, converted to outlines, and every fragile thing about the face stops mattering.

In a game it belongs on the title, the splash screen and the big celebratory message — the moments when one word appears alone and large. It does the same job on album art and video thumbnails, where type has to beat an image by being enormous within the frame.

Where it does not belong

Body text. Two problems stack: counters that close and letterforms with almost no skeleton. A paragraph of Bubble is slower to read than a paragraph of most other display faces, before the size is even reduced.

Small sizes anywhere. Captions, footnotes, ingredient lists, legal print, the back of the packet whose front it is on. Where another display face survives being reduced, this one runs out of white first.

Print on uncoated stock. Ink spreads into absorbent paper and every white shrinks with it, and this face begins with the smallest whites we make. Kraft board, newsprint and paper cups are its worst case.

Reversed out of a dark ground, unless the punched gloss has been checked on a proof first.

Form fields, interfaces and anything read a character at a time. Reference numbers, codes, quantities. In a game: the title is fine, the settings menu is not.

Anything needing a second weight. One weight, no italic: no emphasis, no hierarchy, no small print in the same voice. It has to be paired with a text family that does all of that.

Anything not in English. 105 characters covers English and nothing else, so an accented name will come back broken or fall back silently to another font.

Any brief with a serious tone. The face is cheerful and loud and brings that to whatever it is set on. It cannot be made neutral by setting it smaller or in grey — a bank, a clinic or a legal notice needs a different face.

Bubble is a single weight, 105 characters, and from $3.00. The word above is ours, so try yours on the Bubble page at the size you actually intend to use. Licences are in the shop.